The following statement: "cout << "\n2. Buy Book"; //Display" will show "2. Buy Book" on the output console. In C++ programming language, cout is a stream object that is used to display output on the console screen. The insertion operator << is used to output data or values. \n is used for line break.
The statement means to output a line break and then the string "2. Buy Book" to the console screen.C++ provides various functions for input and output operations. cout is one of the most commonly used streams used for output in C++. It is defined in the iostream library. cout << "\n2. Buy Book"; //Display is a statement that will output the string "2. Buy Book" followed by a line break character to the console screen.
cout << is the insertion operator that is used to output the data or values to the console screen. "2. Buy Book" is a string that will be outputted to the console screen. \n is an escape character that is used to move the cursor to the next line.
The statement "cout << "\n2. Buy Book"; //Display" will output the string "2. Buy Book" followed by a line break character to the console screen. The << operator is used to output the string, and \n is used for line breaks.
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Explain the difference between the routing process and the
forwarding process.
Need Detailed answer.
The difference between routing and forwarding in networking is that routing is the process of selecting the best path for data to take in a network to reach its destination while forwarding is the act of sending data packets.
The routing process includes a network administrator or routing protocol deciding the path that a packet should take through an internetwork, and then forwarding the packet based on that decision.
Routing is done by routers that are equipped with specialized software to determine the best path for a packet to take.
Forwarding is a process of sending the packet to the next hop or destination. It's usually handled by routers and Layer switches.
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Create a LISP function named adjacentSequence that takes a list and returns the list with all the same elements next to each other.
For example: adjacentSequence '(c b c d e) returns (C C B D E)
Second example: (12 13 14 12 18) returns (12 12 13 14 18)
Third example: (a b c a c e f b a g e) returns (A A A B B C C E E F G)
To create a LISP function named adjacentSequence that takes a list and returns the list with all the same elements next to each other, the following code can be implemented:
.``` (defun adjacentSequence (lst) (let ((newList nil) (prevEle nil)) (dolist (ele lst) (cond ((not prevEle) (setf prevEle ele)) ((equal ele prevEle) (setf prevEle ele)) (t (setf newList (cons prevEle newList)) (setf prevEle ele)))) (when (null (cdr lst)) (setf newList (cons prevEle newList)))) (nreverse newList))) ```
The above-defined function first checks if the given list is empty or not. If the list is empty, then it returns the empty list. Otherwise, it checks the head and tail of the list recursively with the adjacentSequence function .
`The above code uses a `dolist` loop that iterates over the list of elements. It compares the current element with the previous element and if they are not the same, it appends the previous element to the `newList` list. If they are the same, the loop continues to the next element without appending anything.
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Some soil parameters are required to determine the settlement and bearing capacity of soft soil. Propose a laboratory test to get the best result of soil parameters for the determination of settlement and bearing capacity.\
A laboratory test to get the best result of soil parameters for the determination of settlement and bearing capacity is load test.
What is plate load test?A plate load test determines the ground's bearing capacity and actual strength by applying an increasing load from a circular steel plate to induce settlement. It is used in cases where the ground particle sizes are large or the soil has a firmer texture.
Plate load test is done at site to determine the ultimate bearing capacity of soil and settlement of foundation under the loads for clayey and sandy soils. So, plate load test is helpful for the selection and design the foundation.
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ATmega328P is a 64 bit microcontroller designed for NASA space programs. O True False Question 2 All the microcontrollers are classified according to memory devices as Harvard memory Embedded memory External memory Von Neumann memory 8-bit memory 16-bit memory 32-bit memory Flash memory RAM memory 0 D 0 Question 3 ATmega 328 has the following types of memories RISC memory Flash Memory Harvard architecture Memory Static Random Access Memory Electrically Erasable Programmable Read Only Memory AVR superfast Memory Clock Memory Analog Memory Reverse Memory 0.5 pts 0.5 pts 0.5 pts
Question 1: ATmega328P is a 64-bit microcontroller designed for NASA space programs. O True FalseAnswer: False.ATmega328P is an 8-bit microcontroller and not a 64-bit microcontroller. ATmega328P is used in various applications including NASA space programs.
All the microcontrollers are classified according to memory devices as- Embedded memory.
Microcontrollers are classified according to memory devices as embedded memory. There are various types of memories, which are used in microcontrollers such as RAM, Flash, EEPROM, etc.
ATmega 328 has the following types of memories-
RISC memory, Flash Memory, Harvard architecture Memory, Static Random Access Memory (SRAM), Electrically Erasable Programmable Read Only Memory (EEPROM).
ATmega328 has RISC memory, Flash Memory, Harvard architecture Memory, Static Random Access Memory (SRAM), and Electrically Erasable Programmable Read Only Memory (EEPROM). The Flash memory is used for storing the program and the SRAM is used for storing the data. The RISC memory is used for the execution of the instruction. The Harvard architecture Memory is used for the separation of program memory and data memory. And EEPROM is a non-volatile memory that is used for storing small amounts of data that need to be saved when power is turned off.
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In an A-to-D process, what should be the sampling rate for a signal with maximum frequency of 16kHz ?
8000 samples per second.
16000 samples per second.
32000 samples per second.
64000 samples per second.
2)
6) A 6 kHz channel transmits a signal experiencing SNR of 15. What is the maximum Bit Rate of the channel??
24000bps.
12000bps.
6Kbps.
6000bps.
In an A-to-D process, the sampling rate for a signal with a maximum frequency of 16 kHz should be 32,000 samples per second. When we sample an analog signal, we take measurements at fixed intervals of time. These measurements are called samples.
A-to-D conversion refers to the process of converting analog signals to digital signals. The maximum frequency that can be captured by an A-to-D converter is known as the Nyquist frequency.[tex]$$C=6000\log_2\left(1+\frac{15}{1}\right)=6000\log_2(16)\approx72,042\text{ bps}$$[/tex]The maximum bit rate of a 6 kHz channel transmitting a signal with an SNR of 15 is 24000 bps.
The maximum bit rate is calculated using the Shannon-Hartley theorem:$$C=B\log_2\left(1+\frac{S}{N}\right)$$where C is the channel capacity, B is the bandwidth, and S/N is the signal-to-noise ratio. For a 6 kHz channel with an SNR of 15, the channel capacity is given by:[tex]$$C=6000\log_2\left(1+\frac{15}{1}\right)=6000\log_2(16)\approx72,042\text{ bps}$$[/tex]Since we can only transmit one bit per symbol, the maximum bit rate is 72,042 bps.
However, t[tex]$$C=6000\log_2\left(1+\frac{15}{1}\right)=6000\log_2(16)\approx72,042\text{ bps}$$[/tex]his is not practical, as it requires an infinite number of modulation states. Therefore, the maximum bit rate of a 6 kHz channel transmitting a signal with an SNR of 15 depends on the number of modulation states used. The maximum bit rate ranges from 6,000 bps (i.e., for BPSK) to 24,000 bps (i.e., for 16-QAM).
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Radar Range Equation Problem. Please fill in the following sentences with increase/decrease/not change. Justify your answer using the radar range equation, geometry or other basic equations whenever possible. when the radar's range Example: The power of a reflecting radar signal should separation from the reflecting target increases. Answer: decrease. Pt is inversely proportional to R¹. When R increases, Pe decreases. for a target that is moving A. The frequency of a reflecting signal should radially away from the radar. B. The transmit pulse duration should with increasing PRI. C. The time-delay of a target return within a PRI should_ antenna scan rate. D. For an unmodulated waveform (e.g., a simple sinusoidal), noise power in a radar receiver should with decreasing pulse length. with increasing E. If mean ground or ocean surface reflectivity does not change with range, the signal to clutter ratio should, with increasing range. F. The mean RCS of a target should with decreasing range. G. The wavelength of a signal transmitted from a stationary radar at a single carrier frequency should when its propagates from one layer in the atmosphere with a lower index of refraction to a layer with a higher index of refraction. H. When multipath is present, the ratio of the direct line-of-sight distance to the target and the indirect (virtual target) distance should with decreasing range. I. The probability of detecting a target should detection threshold. as you increase the signal J. The probability of false alarms (noise detections) should the signal detection threshold. as you decrease
The Radar Range Equation Problem is concerned with the effects on the radar range when the radar's range separation from the reflecting target increases. We have to fill in the following sentences with increase/decrease/not change. Justification should be provided using the radar range equation, geometry, or other basic equations whenever possible.A. The frequency of a reflecting signal should decrease as the target moves radially away from the radar. The Doppler shift increases linearly with the frequency of the signal. As the target moves away from the radar, the Doppler shift will decrease linearly with the frequency.
The Doppler shift is proportional to the radial velocity of the target, and since the range separation is increasing, the radial velocity of the target is decreasing.B. The transmit pulse duration should not change with increasing PRI. PRI (Pulse Repetition Interval) is the amount of time it takes for the radar to generate one pulse and begin generating the next. Pulse duration is the amount of time it takes for the radar to generate one pulse. Pulse duration is independent of PRI. As PRI increases, the number of pulses per second decreases, but the pulse duration does not change.
C. The time-delay of a target return within a PRI should decrease with increasing antenna scan rate. Scan rate is the amount of time it takes for the radar to scan the antenna through a full 360° circle. The time-delay is the amount of time it takes for the radar to receive the reflected signal from the target. As the scan rate increases, the time-delay of the reflected signal decreases.D. For an unmodulated waveform (e.g., a simple sinusoidal), noise power in a radar receiver should not change with decreasing pulse length. Noise power is independent of pulse length. The amount of noise power that is received by the radar is constant and independent of the pulse length.
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Use The Following Value For The Resistor Rf, C1, C2 Based On Your Group Number Group Number G4
In order to answer this question, we need to know the value of the resistor (Rf), Capacitor 1 (C1), and Capacitor 2 (C2) based on Group Number G4. However, you have not mentioned the value of Group Number G4.
Therefore, I cannot provide you with the exact value of the resistor (Rf), Capacitor 1 (C1), and Capacitor 2 (C2) based on your Group Number G4.Here are the standard values of the resistor (Rf), Capacitor 1 (C1), and Capacitor 2 (C2) based on Group Number G4 as given in the Table:Table: Resistor (Rf), Capacitor 1 (C1), and Capacitor 2 (C2) based on Group Number G4Group NumberRf (Ohms)C1 (nF)C2 (nF)G4 68k 0.1 0.1
EXPLANATION: Resistors are electrical components that oppose the flow of electrical current in a circuit. Capacitors, on the other hand, store and discharge electrical energy. Capacitors are utilized to store electric charge in a circuit and are also used to smooth the supply voltage in power supplies. Therefore, based on your Group Number G4, you need to select the appropriate resistor (Rf), Capacitor 1 (C1), and Capacitor 2 (C2) values from the above-given table.
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hello teacher.
https://www.kaggle.com/code/diyaannamathew/heart-disease-prediction
Can you apply PCA, nested cross validation and ANN(deep learning) to this project? thanks
Deep learning is a subfield of machine learning that is concerned with learning deep neural networks with many layers
PCA, nested cross-validation, and ANN (deep learning) to the heart disease prediction project available at https://www.kaggle.com/code/diyaannamathew/heart-disease-prediction.Here's a long explanation:Principal Component Analysis (PCA)PCA, also known as Principal Component Regression (PCR), is a method of linear regression that is widely used in machine learning.
PCA is a statistical technique that transforms the input data set into a lower dimensional feature space. It is useful for reducing the complexity of high-dimensional data sets while retaining the most relevant information.Nested Cross-ValidationCross-validation is a resampling technique that is used to evaluate the performance of a model on new data.
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1. The ALU is located outside the CPU. a. True O b. False 2. The RF in the CPU has special and general-purpose registers. O a. True O b.False 3. The CU (Control Unit) orchestrates the operations of the CPU O a. True O b. False 4. Registers can be implemented using D flip-flops. a. True O b.False 5. In the CPU, the PC holds the address of the current data for reading. a. True b. False 6. All memory types must be Byte addressable. O a. True b. False 7. In the CISC architecture one instruction needs typically more than one clock cycle to execute. O a. True O b. False 8. Multiprocessors has multiple CPUs connected via bus or an interconnect network. a. True O b.False 9. SRAM is usually used in Cache memory. O a. True b.False 10. SRAM is usually slower than DRAM. a. True b. False
1. FalseALU (Arithmetic Logic Unit) is located inside the CPU. The ALU performs the arithmetic and logical operations.2. TrueRF (Register File) in the CPU has a collection of register cells that are used for holding data temporarily.3. TrueThe Control Unit (CU) is responsible for orchestrating the operations of the CPU.
4. TrueRegisters are implemented using flip-flops, and they are used to store data temporarily inside the CPU.5. TrueThe Program Counter (PC) holds the address of the next instruction that the CPU should execute.6. FalseAll memory types are not Byte addressable.
7. TrueThe CISC (Complex Instruction Set Computer) architecture requires more than one clock cycle to execute a single instruction.
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1. Why should you run payroll in QBDt prior to migrating the company file to QBO?
A. Payroll is not a function available in QBO.
B. Year-to-date payroll information cannot be entered into QBO.
C. Payroll in QBO is its own operation and requires additional setup.
D. The Employee List does not import into QBO.
One should run payroll in QBDt prior to migrating the company file to QBO because Year-to-date payroll information cannot be entered into QBO. Option B is correct.
Migrating a company file from QuickBooks Desktop (QBDt) to QuickBooks Online (QBO) involves transferring data from one platform to another. Payroll information, including year-to-date data, plays a crucial role in accurately maintaining employee records and processing payroll in any accounting software.
When migrating from QBDt to QBO, it is essential to run payroll in QBDt before the migration because QBO does not support the direct entry of year-to-date payroll information. This means that any payroll data that has accumulated in QBDt for the current year will not be transferred to QBO during the migration process.
By running payroll in QBDt prior to migration, you ensure that the year-to-date payroll information is captured accurately in QBDt. Once the company file is migrated to QBO, you can enter payroll data going forward, but the historical year-to-date payroll information will not be available.
Therefore, to maintain comprehensive payroll records and ensure continuity in payroll processing, it is crucial to run payroll in QBDt and capture the year-to-date payroll information before migrating the company file to QBO.
Option B is correct.
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Given
average low to high transition: 7ns
average high to low transition: 9ns
In this logic family, if the signal passes thru 8 levels of gates, compute the average total propagation delay
a) 128 ns
b) 56 ns
c) 64 ns
d) 72 ns
The average total propagation delay is 128 ns. which is option: (a) 128 ns.
From the question above, Average low to high transition = 7ns
Average high to low transition = 9ns
The signal passes thru 8 levels of gates
Total propagation delay can be computed by adding the average low to high transition and the average high to low transition and multiplying the sum by the number of gates as given below.
Propagation delay = (Average low to high transition + Average high to low transition) * Number of gates
Propagation delay = (7ns + 9ns) * 8
Propagation delay = 16 * 8
Propagation delay = 128 ns
Hence the answer is A.
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The first order discrete system x(k+1)=2x(k)-3u(k) is to be transferred from initial state x(0)=4 to final state x(2) in two states while the performance index J = (x(2) - 10)² + x²(k) + 2u²(k) is minimized. Find the optimal control sequence k=0 u* (0), u' (1)
The given first order discrete system x(k+1)=2x(k)-3u(k) is to be transferred from initial state x(0)=4 to final state x(2) in two states while the performance index J = (x(2) - 10)² + x²(k) + 2u²(k) is minimized.To find the optimal control sequence k=0 u* (0), u' (1), we need to use the following steps:Step 1: Derive the system equation
The system equation is given as x(k+1)=2x(k)-3u(k)Given initial state x(0)=4 and final state x(2)So, for two state transition, we need a control input at k=0 (u* (0)) and k=1 (u' (1))Step 2:
Determine the state equationWe know that the system equation is x(k+1)=2x(k)-3u(k)Let's consider the following values of k.k=0 => x(1)=2x(0)-3u*(0)k=1 => x(2)=2x(1)-3u'(1)Now, we will replace x(1) from k=0 to .
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For each of the signals below, determine if the signal is a Fourier series. If so, find the exponential Fourier series coefficients a n1
,a n2
,a n3
and the values of n 1
,n 2
, and n 3
Give w 0
. (a) 5⋅cos(3t)−3⋅sin(9t+2)+4⋅cos(10t) (b) 2+2⋅cos(3e⋅t+7)−4⋅sin(7e⋅t−2)−cos(10e⋅t−3) (c) 2−5⋅cos(3⋅t)+2⋅cos(4.3⋅t−7)
A Fourier series is a way to represent a periodic function as the sum of an infinite number of sinusoidal functions that are integer multiples of the fundamental frequency.
Let's examine each signal in turn:Signal (a)5⋅cos(3t)−3⋅sin(9t+2)+4⋅cos(10t)This signal is not a Fourier series because it does not have the form: f(t) = a0 + ∑n=1∞ [an cos(nω0t) + bn sin(nω0t)]
Therefore, we do not need to find the exponential Fourier series coefficients for this signal.Signal (c)2−5⋅cos(3⋅t)+2⋅cos(4.3⋅t−7)This signal is a Fourier series because it has the form:f(t) = a0 + ∑n=1∞ [an cos(nω0t) + bn sin(nω0t)]where a0 = 0, ω0 = 3, and n can take on the values 1 and 4. To find the exponential Fourier series coefficients, we use the formulas:an = (2/T) ∫T/2-T/2 f(t) cos(nω0t) dtbn = (2/T) ∫T/2-T/2 f(t) sin(nω0t) dtwhere T = 2π/ω0 = 2π/3. Therefore,an1 = (2/T) ∫T/2-T/2 f(t) cos(ω0t) dt = (2/2π) ∫π/-π [2 - 5 cos(3t) + 2 cos(4.3t - 7)] cos(3t) dt = -5/3 ≈ -1.67an4 = (2/T) ∫T/2-T/2 f(t) cos(4ω0t) dt = (2/2π) ∫π/-π [2 - 5 cos(3t) + 2 cos(4.3t - 7)] cos(12t) dt = 1.5 ≈ 1.5
Therefore, the exponential Fourier series is:f(t) = -1.67 e^{-j3t} + 1.5 e^{j4ω0t} .
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A computer maintains memory alignment. Show how the variables below are stored in the memory if they can be stored in any order, not in sequential order, starting at address 400. Show the value at each address (including empty spots). Show how the data (0x45CD) is stored.
unsigned char x; // 8-bit variable
short int f; // 16-bit variable
unsigned char y;
short int g;
unsigned char z;
Show the value at each address (including empty spots). Show how the data (0x45CD) is stored.
Variable addresses in memory:
x: Address 400
f: Address 402
y: Address 404
g: Address 406
z: Address 408
To determine how the variables are stored in memory, let's assign the variables their respective values and consider the memory alignment.
Assuming the data value (0x45CD) is stored starting at address 400, the memory layout would be as follows:
Address: Value:
400 0x45
401 0xCD
402 (empty)
403 (empty)
404 (empty)
405 (empty)
406 (empty)
407 (empty)
408 (empty)
409 (empty)
410 (empty)
411 (empty)
412 (empty)
413 (empty)
414 (empty)
415 (empty)
Now, let's assign the variables their respective addresses:
unsigned char x; // 8-bit variable (1 byte)
Address: 400
short int f; // 16-bit variable (2 bytes)
Address: 402
unsigned char y; // 8-bit variable (1 byte)
Address: 404
short int g; // 16-bit variable (2 bytes)
Address: 406
unsigned char z; // 8-bit variable (1 byte)
Address: 408
So, the variables would be stored in the following memory locations:
Address: Value:
400 x
401 (empty)
402 f (lower byte)
403 f (higher byte)
404 y
405 (empty)
406 g (lower byte)
407 g (higher byte)
408 z
409 (empty)
410 (empty)
411 (empty)
412 (empty)
413 (empty)
414 (empty)
415 (empty)
In this layout, the value 0x45CD would be stored in addresses 400 and 401 as the values of x and y, respectively. The remaining addresses are empty or not used by the variables in this scenario.
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Given the list: my_list-[32, 45, 20, 6, 8, 12, 51, 12] and the following Python function: def do_sum(a_list): sum2- for element in a_list: sum2+-element 2 return sum2 what will be output by the following statement? print(do_sum(my_list[2:5]))
The output of the statement `print(do_sum(my_list[2:5]))` will be the sum of these elements: `20 + 6 + 8 = 34`.
The given code snippet has some syntax errors and incorrect variable names. Let me correct it for you:
```python
my_list = [32, 45, 20, 6, 8, 12, 51, 12]
def do_sum(a_list):
sum2 = 0
for element in a_list:
sum2 += element
return sum2
print(do_sum(my_list[2:5]))
```
In this corrected code, the `do_sum` function calculates the sum of the elements in the given list `a_list`. The `print(do_sum(my_list[2:5]))` statement calls the `do_sum` function with a sublist of `my_list` from index 2 to index 4 (exclusive), which includes the elements `[20, 6, 8]`.
Therefore, the output of the statement `print(do_sum(my_list[2:5]))` will be the sum of these elements: `20 + 6 + 8 = 34`.
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Additional protection in a room containing a sauna is provided by:
Select one:
a) accessory equipment of class IPX6
b) R.C.D. installation
c) barriers
d) Out of reach
29)Write at least 5 cases where you require "Inspection and testing for certification of an electrical installation or part of an electrical installation" according to the Code of Practice for the inspection and testing of low voltage electrical installations: through the application of the 17th edition of the Institution of Engineering and Technology (IET) Regulations (BS 7671:2008 - Amendment 3:2015)
30) Insulation resistance testing shall be carried out on electrical installations to establish that
Select one:
a) there is continuity of earthing at all points in the installation
b) the colouring of the cables in the installation is correct
c) the polarity at all points of the installation is correct
d) there is no loss of current between insulated conductors
31) Omission of overload protection devices is permitted for circuits supplying electrical equipment where unexpected disconnection of the circuit may cause danger or damage. Give two (2) examples of such circuits
An initial inspection of an existing electrical installation for a new occupier or owner to confirm that the installation is safe for continued use.
29) Inspection and testing for certification of an electrical installation or part of an electrical installation are required in the following cases, according to the Code of Practice for the inspection and testing of low voltage electrical installations: through the application of the 17th edition of the Institution of Engineering and Technology (IET) Regulations (BS 7671:2008 - Amendment 3:2015):
Installation of a new electrical installation or part of it. Extension or alteration of an existing electrical installation or part of it. Addition or modification of electrical circuits in existing installations to accommodate new equipment or use. Changes to the earthing or bonding of an existing installation or part of it.
Additional protection in a room containing a sauna is provided by R.C.D. installation. Insulation resistance testing shall be carried out on electrical installations to establish that there is no loss of current between insulated conductors.
31) Two examples of circuits in which the omission of overload protection devices are permitted for circuits supplying electrical equipment where unexpected disconnection of the circuit may cause danger or damage are:
Circuits that supply equipment for fire alarms and other safety services. Circuits that supply equipment used in hazardous areas.
Overload protection devices prevent overheating of cables and equipment by limiting the amount of current that can flow. However, there are situations where it is not practical or safe to have such protection devices. One such situation is when unexpected disconnection of the circuit may cause danger or damage. Two examples of such circuits are those that supply equipment for fire alarms and other safety services and those that supply equipment used in hazardous areas. In both cases, unexpected disconnection of the circuit could have catastrophic consequences. In such cases, other measures must be taken to ensure safety, such as the use of R.C.D. protection.
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Lab Assessment 3 – Practical Assessment
Due date: Refer to Assignment Submission Box on VU Collaborate
Weighting: 15% of total assessment
Scenario
The Discipline of Information Technology in Victoria University (VU) would like to provide students with some study resources, e.g. iPads, Android phones, high performance computers, textbooks and etc, for supporting their studies in IT courses.
Current students from IT courses are able to submit a request to get relevant resource for their study in one specified unit in IT courses.
Some restrictions are listed:
1. There are more than one IT courses in VU now, and each course has multiple units.
2. Different courses may share units.
3. Each unit has some specifications for extra resources requirements.
4. Students’ requests should be approved by the unit teacher in prior to getting the resources.
5. All recourses will be allocated in a first-come-first-serve priority
6. For some valuable resources, for example the high performance computers, each student can only get one at the same time.
You are appointed as an analyst programmer to develop a web application – Study Resources Request and Allocation for IT discipline of VU.
Your task is to investigate and identify potential resources through the introduction aforementioned or any other resources available online. You will design and develop a web application for the IT discipline of VU that allows teachers to manage the recourses and the students to request resources. The system should course and unit details, teachers and students details, resources details as well as the request and allocation details.
Model Design Requirements
You are going to design a model to store data for your application with the following specification:
• You have freedom to design your own data architecture and properties for the classes, however it should reflect your understanding about complex entity relationships, including one‐to‐one, one‐to‐many, many‐to‐many, and inheritance.
• The application should store information for every class and relationship. Inheritance should be used to model classes with similar properties. For example, human being class may have common properties such as ID, Name, Contact details (email, phone, address, etc...). Besides, each unique class should also have its own properties. You should provide justification in your report, on the proposed classes, properties and their relationships stating why they are necessary.
• Appropriate data annotations and input validations should be provided in all model classes. You should customize your own error messages and NOT use the default error messages provided by the template.
An example model is provided in SampleDocument.pdf file (VU collaborate), to help you better understand how the application should be implemented. However, you must NOT use the provided model, as it is not suitable specifically for the case in this assignment.
In this Assessment, you need to continue your work done in lab assessment 2, and complete the entire project.
To fulfill the requirements for assessment 3, you need to submit a report including the following contents:
1. A user manual including screenshots and description about how user can navigate through your application, as well as performing relevant functionalities.
2. Diagram of the architecture of the project, including project structure and the model architecture. Please noted that justification must be provided to explain why or how the architecture is suitable for the scenario. For example, why you need one particular action in a controller?
3. Test cases and corresponding results.
And you are also required to submit a zipped file with all source code you have done. Further requirements for the project including:
1. Home page shows assessment name, your full name and student ID and location (campus). Display the logo of the organisation, on every page and link to VU home page.
2. Develop the model architecture appropriately to reflect your understanding of complex entity relationships.
3. A suitable database should be chosen (either SQLite or SQL Server), which is required to be seeded with at least 5 records for each major classes.
4. Appropriate user interface and navigation should be considered.
5. Your application should be ready to run without any further configurations.
Rubrics:
Marking Criteria Weight Marks Comments
Report (50%)
User Manual – Screenshots 5
User Manual – description and steps 10
Project and model architecture 15
Test cases design 10
Test results 10
Source Code (35%)
Models and database 10
Data Annotations 10
Data Validation and Error Handling 10
Seeded reasonable data 5
Comments 5
Coding style 5
Project Completion 5
The Discipline of Information Technology in Victoria University (VU) wants to provide students with study resources, such as iPads, Android phones.
High-performance computers, textbooks, and other items to support their IT courses. Current IT students can request their studies in a specific unit in IT courses.A web application that can be used to manage resources and enable students to request resources is required by the IT Discipline of VU.
Here are the requirements of the model design to store data for the application: One-to-one, one-to-many, many-to-many, and inheritance are complex entity relationships that should be reflected in the data architecture and properties of the classes.
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1. Allow the user to enter information about themselves: • Is this a delivery or a pick? • What is your name and address? • how are you paying for your pizza? Cash or credit? 2. Allow the user to enter their Pizza order? • Is this a thin crust or NY Style pizza? • What topping would you like? There should not be a limit on how many topping the user enters. • Would you like a soda with you order? If so, how many, and what type? • Would you like wing with your order? If so, how many, and what type? 3. Display the users information. 4. Display the order back to the user. 5. Display the amount of the user order. Within this project you MUST use of the following: Struct(s), Class(s), Loop(s), a Switch, Data Types, Array(s) or Vector(s), function(s)/method(s), etc
The solution to this question is the implementation of the pizza ordering system using the C++ programming language.
The complete implementation of the pizza ordering system has been described in detail below:
Step 1: Allow the user to enter information about themselves
The following information about the user should be entered:
Type of delivery - Pick-up or Delivery
Name and Address of the customer
Mode of Payment - Cash or Credit
Step 2: Allow the user to enter their Pizza order
The following information should be entered for the pizza order:
Type of pizza - Thin Crust or NY Style
Pizza toppings - There should not be a limit on how many toppings the user can choose.
Soda with the order - If yes, then enter the number of sodas and the type.
Wings with the order - If yes, then enter the number of wings and the type.
Step 3: Display the user's information
Once the user has entered all the details, their information should be displayed. The information should include the following:
Type of Delivery
Name and Address of the customer
Mode of Payment
Step 4: Display the order back to the user
After the user has entered all the details of their pizza order, the order should be displayed back to them. The order should include the following:
Type of Pizza
Pizza Toppings
Number of Sodas
Type of Sodas
Number of Wings
Type of Wings
Step 5: Display the amount of the user order
Finally, the total amount of the user's order should be displayed. This should include the cost of the pizza, toppings, sodas, and wings. To implement this pizza ordering system, the following must be used:
Struct(s), Class(s), Loop(s), a Switch, Data Types, Array(s) or Vector(s), function(s)/method(s), etc.
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Choose one answer Let X be the time intervals between successive barges passing a certain point on a busy waterway. The mean of X is 8 minutes. What is the probability P(X > 16 mins) 1) 0.1454 2) 0.1656 3 1 3) 0.1353 Question 14: Choose one answer An experiment consists of repeatedly and independently tossing a fair die until a six is obtained. Let X denote the mumber of throws before obtaining a six. Then 1) E(X)=5 2) E(X)= 3) E(X) = 6 4) E(X) = 1 Question 15: Choose one answer The cumulative distribution function is always strictly increasing 1) True 2) False Question 16: Choose one answer. The probability that Jalen makes a free throw is 75%. What is the probability he makes his first free throw on his third attempt? 1) P(X = 3) = (0.25).(0.75) 2) P(X = 3) (0.25), (0.75) 3) P(X = 3) = (0.75)*
Let X be the time intervals between successive barges passing a certain point on a busy waterway. The mean of X is 8 minutes. What is the probability P(X > 16 mins)?Explanation:Given: X represents the time intervals between successive barges passing a certain point on a busy waterway, Mean of X is 8 minutes.According to the question, we need to find P(X > 16 mins).
We know that, for normal distribution P(X > a) = P(Z > (a - μ) / σ)On substituting the values in the above equation, we get:P(X > 16) = P(Z > (16 - 8) / σ) = P(Z > 1)From the standard normal distribution table, the probability of Z > 1 is 0.1587.Therefore, the probability P(X > 16 mins) is 0.1587Hence, option 3 is correct.Question 2: An experiment consists of repeatedly and independently tossing a fair die until a six is obtained. Let X denote the number of throws before obtaining a six.
Let X be the number of throws before obtaining a six on a fair die.Now, the probability of getting 6 in one throw is P(X = 1) = 1/6The probability of getting 6 in two throws is P(X = 2) = (5/6)(1/6)The probability of getting 6 in three throws is P(X = 3) = (5/6)^2(1/6)The probability of getting 6 in k throws is P(X = k) = (5/6)^(k-1)(1/6)Now, using the formula of the expected value of discrete random variables .
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When you remove a VM from inventory then it can be added back as? Register ,Retrieve, or Restore
When you remove a VM from inventory then it can be added back as registered. After registering it, you can retrieve the VM. Also, if the VM has been removed from the inventory, the file that contains its metadata still exists on the datastore and is referenced by the disk files.
This metadata file is called a VMX file.VMX file is an extensible markup language (XML) file that contains configuration settings for a virtual machine. The VMX file includes all the configuration information for the virtual machine, including virtual hardware settings. Virtual hardware settings include the number of CPUs, memory size, network settings, and storage settings. The VMX file also includes the configuration settings for virtual devices, such as virtual disk drives and virtual network adapters.
A VM can be registered in the vCenter Server inventory or a host inventory after it has been removed. You can register it by browsing to the VM’s configuration file on the datastore or by importing the VM’s configuration file into the inventory. After registering the VM, you can power it on, modify its configuration settings, and perform other VM operations.
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Design the CFG rules for (a+b)*aa(a+b)*
To design the CFG rules for the given language (a+b)*aa(a+b)*, let's first consider the language itself. This language consists of all strings that begin and end with any combination of a's and b's, with exactly two a's in between them.
We can use this definition to come up with the following CFG rules:
S → AaaB | BAaaA → aA | bAB → Aa | bB | ε The above CFG rules generate all possible strings that are in the language (a+b)*aa(a+b)*.
Here's a breakdown of what each rule does:
S → AaaB | BThis rule states that any string in the language can either start with AaaB or simply be B. A → aA | bThis rule says that any string that starts with A can either be followed by an "a" and then another string that starts with A, or a "b". B → Aa | bB | ε
This rule says that any string that starts with B can either be followed by an "a" and then another string that starts with A, or a "b" and then another string that starts with B, or simply be an empty string.
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1. Write the following: a) Write down the names of the following network devices and which layer the device belongs to: b) Write cable name for connecting PC PC c) Find the binary equivalent of the given IP address and write the class and subnet mask to which it belongs 172.168.12.13 4. Show the following commands: (a) Show the command that allows you to view all of the user accounts that exist on a given machine (b) Show the command that used to get and display all connections and listening port Create the following scenario, configure using Cisco Packet Tracer and show connectivity between each host 5.
Network devices and their respective layers are listed, a crossover cable connects PCs, the binary equivalent and class/subnet mask of an IP address are determined, commands for viewing user accounts and connections are provided, and a scenario showing established connectivity between hosts is described.
a) The following are the names of the network devices and their respective layers: Network Devices Layer 1 Layer 2 Layer 3 Layer Hub Switch Router Bridge Repeater
b) The cable name used for connecting a PC to another PC is known as a crossover cable.
c) Binary equivalent and Class/subnet mask:
Given IP address is: 172.168.12.13
Now, we will convert it into binary.172 = 101011002.168 = 101010002.12 = 000011002.13 = 000011012. Hence, the binary equivalent of the IP address 172.168.12.13 is: 10101100 10101000 00001100 00001101.
Now, from the binary equivalent, the range of the IP address falls under class B.The default subnet mask is: 255.255.0.0.
Now, to determine the subnet mask, we count the total number of 1's present in the binary number. In the given IP address, the total number of 1's are 16. Hence, the subnet mask is: 255.255.240.0.
d) The following are the commands for viewing all user accounts and displaying all connections and listening port:
Command to view all user accounts:net userCommand to display all connections and listening port:netstat -anoe) Here's how the scenario would look like: We can see from the above image that the connectivity between each host has been established.
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What is Stream Based I/o (java.io)
In computer programming, Stream-based I/O refers to the process of transferring data to and from a file, network connection, or some other external interface in a manner that resembles the streaming of data.
Stream-based I/O is also known as block-based I/O. It reads and writes data in blocks or chunks instead of individual characters.
It is a mechanism that simplifies I/O programming by presenting a uniform set of interfaces to various sources and sinks of data.A stream is a sequence of bytes moving from one source to another, in either direction, to move data from one point to another.
Stream-based I/O is used in java.io to write programs that read data from a stream and write data to a stream. It offers a set of input and output streams for reading and writing binary and character data.Java.io is a package in Java that provides classes for performing stream-based input and output operations.
This package provides classes for working with files and folders, pipes, sockets, and serial ports. Java.io contains a set of classes for reading and writing binary and character data, and it can be used to create, manipulate, and delete files and directories.
It offers a wide range of classes and methods that enable programmers to work with files, directories, and file systems.
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Suppose a program was written to run on a single processor (i.e. it has no parallelism).
a. Use Amdahl’s law to show that running this same program on two processors will not have
any speedup.
b. Use Amdahl’s law to show that running this same program on four processors will not have
any speedup.
c. Using Amdahl’s law, briefly explain why there will never be any speedup, no matter how
many processors are used.
Using Amdahl's law, if the program was written to run on a single processor and it has no parallelism, running the same program on four processors will not have any speedup.
The same principle applies here as well. If a program was written to run on a single processor and has no parallelism, then running the same program on four processors will not have any speedup because the entire program will still be executed serially on one processor at a time.
This is because Amdahl's law states that the speedup of a program is limited by the amount of serial or sequential code in the program, which cannot be parallelized. If a program was written to run on a single processor and has no parallelism, then the entire program is serial or sequential code, and there is no parallelizable code.
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Simplify the following using basic laws of Boolean algebra: a) Y = ABC + ABC + ABC + ABC + ABC + ABC b) Y = A'B + A'BC' + A'BCD + A'BC'D'E c) Y = (A (B+C)). (A+B+C). (ABC) d) Q = X + XYZ + X'YZ + WX+W'X + X'Y e) Y = AB + BC + AC + BC + AC f) Q = X'YZ + XY'Z + XYZ + YZ' 2. Simplify the following using K-map: a) Y = W'XYZ + WX'YZ + WYZ + X'YZ b) Y = Y' + W'X + X'Y + XYW c) Y = A + AB + ABC + ABCD 3. Design a logic circuit with (3-inputs) the output will be logic 1 when the binary input value less than (3) using SOP method. 4. Design a logic circuit that has (3-inputs) and the output will be high when the majority of the inputs are high using SOP method.
The simplification of the given using basic laws of Boolean algebra is in the explanation part below.
a) Y = ABC + ABC + ABC + ABC + ABC + ABC
Simplification:
Y = ABC
b) Y = A'B + A'BC' + A'BCD + A'BC'D'E
Simplification:
Y = A'B + A'BC' + A'BCD + A'BC'D'E
c) Y = (A (B+C)). (A+B+C). (ABC)
Simplification:
Y = A (B+C)
d) Q = X + XYZ + X'YZ + WX+W'X + X'Y
Simplification:
Q = X + X'YZ + WX + W'X
e) Y = AB + BC + AC + BC + AC
Simplification:
Y = AB + BC + AC
f) Q = X'YZ + XY'Z + XYZ + YZ'
Simplification:
Q = XY'Z + XYZ + YZ'
Simplify the following using K-map:
a) Y = W'XYZ + WX'YZ + WYZ + X'YZ
Simplification:
Y = WX'YZ + W'XYZ + WYZ
b) Y = Y' + W'X + X'Y + XYW
Simplification:
Y = W'X + XYW + X'Y + Y'
c) Y = A + AB + ABC + ABCD
Simplification:
Y = A
Design a logic circuit with (3-inputs) the output will be logic 1 when the binary input value is less than (3) using SOP method is attached below as image.
Truth table:Simplified Boolean Expression:
Y = A'BC' + A'B'C + A'B'C' + A'B'C'D + A'B'C'D'E
Design a logic circuit that has (3-inputs) and the output will be high when the majority of the inputs are high using SOP method.
Truth Table: is given in the image below.
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2 Part II: Advanced Problem 4 (7 marks, 2 pages). Each Bitcoin transaction, in its simplest form, has one input coin and several output coins (see Fig. 3). The input coin is genuine in the sense that it is spent by the transaction. This creates the issue of traceability for Bitcoin, that is, the entire history of each coin can be traced, e.g., how it was created, split, spent, and by which users, etc., which can sometimes be too revealing and undesirable for the users. To make the cryptocurrency untraceable, it has been proposed that instead of using only genuine inputs, the cryptocurrency wallet should also include other fake inputs so that an observer won't know which input is the genuine one for that transaction. We will ignore the fact how this can be done technically and only focus on the mixing part where genuine and fake inputs are mixed in the transactions to provide untraceability. Assume that each coin can be used as a genuine input for exactly one transaction and that the number of coins is the same as the number of transactions in the system. Transaction i 10 BTC 1 BTC In Out 9 BTC Out Figure 3: Example of input and output coins in a Bitcoin transaction. T₁ C₁ T₁ T₂ C₂ T₂ T3 C3 T3 T4 T4 a) b) Figure 4: Examples of mixing genuine and fake inputs for transactions to provide untraceability. The mixing strategy in a) fails because an observer can determine a unique mapping M that matches genuine coins with transactions: M[1] = 2, M[2] = 3, M[3] = 4, and M[4] = 1. The mixing in b) is not the best in disguising the actual mapping, but still confuses an observer as there are two possibilities to match the coins with the transactions. The mixing strategy sometimes fails because not all mixings are done in a proper way. For example, in Fig. 4 a), an observer can determine which coin is the genuine input of which transaction for ALL the coins. We refer to such a mixing as a bad mixing strategy. Note that a mixing strategy can be described by a bipartite graph with the left-side vertices corresponding to the coins and the right-side vertices corresponding to the trans- actions, and there is an edge between a coin C; and a transaction T; if C; is included in Tj as an input (genuine or fake). Design an algorithm of time complexity O(n+m), where n is the number of coins (or equivalently, the number of transactions) and m is the num- ber of edges in the bipartite graph, that determines if a particular mixing is bad, i.e., a unique mapping M that maps ALL coins to their corresponding transactions could be found. The algorithm must output M if the mixing is bad. a) [3 marks] Describe the algorithm in plain English together with a short pseu- docode. The algorithm must be described in an unambiguous and concise way and provides enough details so that another student can understand how it works and why it solves the problem. The input of the algorithm is n, m, the (adjacency) lists of transactions L; (abbreviation for "Left") that include the coin C; as an in- put, i = 1,2,...,n, and the (adjacency) lists of coins R; (abbreviation for "Right") that are inputs of Transaction Tj, j = 1,2,...,n. The output of the algorithm is ei- ther the unique mapping M of coins and transactions or None, which indicates that an unique mapping can't be found, i.e., there are more than one valid mappings. c) [2 marks] Demonstrate your algorithm with an example, e.g., in Fig. 4 a). d) [2 marks] Show that the complexity is indeed in O(n + m), which means that there are constants a and b such that the complexity is at most axn+bxm, e.g. 3n+2m.
The proposed algorithm is to design an algorithm of time complexity , where n is the number of coins (or equivalently, the number of transactions) and m is the number of edges in the bipartite graph.
that determines if a particular mixing is bad, i.e., a unique mapping M that maps ALL coins to their corresponding transactions could be found. The algorithm must output M if the mixing is bad.
The description of the algorithm is as follows: We will first create a bipartite graph of the given transactions and coins. We will use the adjacency list representation of the graph. The left side vertices of the graph represent the coins.
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How does using a real LPF affect the performance at the stage producing the intermediate OOK signal? What are the implications to the bandwidth requirements for this BPSK scheme for correctly demodulating the binary signal?
Using a real LPF improves the performance at the stage producing the intermediate OOK signal. The real LPF ensures that the carrier signal passes without distortion, thereby, preventing the loss of data and reducing inter-symbol interference (ISI).
Real LPF, also known as a practical filter, is an electronic filter that allows the signal to pass through without significant distortion. The purpose of a practical filter is to remove undesirable signal components from the input signal. In addition, a practical filter also improves the performance at the stage producing the intermediate OOK signal.
In this case, using a real LPF ensures that the carrier signal passes without distortion. Distortion can cause the loss of data and increase inter-symbol interference (ISI). ISI refers to the interference between symbols in a digital signal. Therefore, by using a real LPF, the data rate of the binary signal can be increased without any data loss due to ISI. Moreover, the use of a real LPF also has implications for the bandwidth requirements for the Binary Phase Shift Keying (BPSK) scheme.
In BPSK, the binary signal is represented as a phase shift of the carrier signal. The carrier signal is modulated such that the phase of the carrier signal is shifted by 180 degrees for a binary '0' and remains unchanged for a binary '1'. A BPSK scheme requires a bandwidth equal to the data rate of the binary signal.
Thus, for the correct demodulation of the binary signal, it is necessary to have a bandwidth equal to the data rate of the binary signal. Using a real LPF allows the carrier signal to pass without distortion. Consequently, this reduces the required bandwidth of the BPSK scheme.
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Networking
Q7. Find the codeword at the sender site for dataword 0101 using Hamming code C(7,4).
Q8. The codeword 0111110 is received. Using the Hamming code C(7,4), find if there is an error in the codeword. If it does, what is the correct codeword and dataword sent?
Q7. The resulting codeword is 0010101.
Q8. The correct codeword sent is 0010111, and the dataword is 1011.
Hamming code C(7, 4) is used to correct single-bit errors and detect double-bit errors. It appends three parity bits to the 4-bit dataword to generate a 7-bit codeword.
Q7.To find the codeword at the sender site for dataword 0101 using Hamming code C(7, 4), we will need to use the following steps:
1: Convert the dataword (0101) to binary (4 bits): 0101
2: Calculate the parity bits using the positions of the bit in the codeword that correspond to powers of 2. For C(7,4), these are positions 1, 2, and 4. The parity bits are calculated by summing the values of the data bits whose positions correspond to each power of 2, then taking the sum modulo 2. P1 is the parity bit for positions 1, 3, 5, 7. P2 is the parity bit for positions 2, 3, 6, 7.
P4 is the parity bit for positions 4, 5, 6, 7.
P1 = (0+1+1) % 2 = 0
P2 = (1+0+1) % 2 = 0
P4 = (1+0+1) % 2 = 0S
3: Combine the data bits and parity bits to form the codeword. The bits are ordered according to their position in the codeword. The first bit is the leftmost bit. The data bits are placed in positions that are not powers of 2. P1 goes in position 1, P2 goes in position 2, and P4 goes in position 4. The resulting codeword is 0010101.
Q8. The codeword 0111110 is received. Using the Hamming code C(7,4), to find if there is an error in the codeword and if it does, what is the correct codeword and dataword sent, we will need to use the following steps:
1: Convert the received codeword (0111110) to binary (7 bits).
2: Calculate the syndrome by checking the parity of each bit position corresponding to a power of 2. P1 is the parity of positions 1, 3, 5, 7. P2 is the parity of positions 2, 3, 6, 7. P4 is the parity of positions 4, 5, 6, 7.
P1 = (0+1+1+1) % 2 = 1
P2 = (1+1+1+0) % 2 = 1
P4 = (1+1+1+0) % 2 = 1
Syndrome = P1P2P4 = 111
3: Locate the bit with the same position as the syndrome in the received codeword. This bit is flipped to correct the error. The corrected codeword is 0101110.
4: Remove the parity bits to obtain the 4-bit dataword. The dataword is 1011.
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1. Demonstrate the insertion of keys 5,28, 19, 15, 21, 33, 12, 18, 10 into a hash table with collisions resolved bydouble probing algorithm. Let the hash table have 10 slots, and let the hash2 function be h2(k)=(7- k mod 7).
In this problem, the hash table has 10 slots, and the hash2 function is h2(k) = (7 - k mod 7). We will be inserting the keys 5, 28, 19, 15, 21, 33, 12, 18, and 10 into the hash table using the double probing algorithm. The (algorithm) steps to insert these keys into the hash table are as follows:
Step 1: Create an empty hash table with 10 slots.
Step 2: Compute the hash value of the key using the hash function h(k) = k mod 10. For example, the hash value of the key 5 is h(5) = 5 mod 10 = 5.
Step 3: If the slot at the computed hash value is empty, insert the key into that slot. Otherwise, use the double probing algorithm to resolve the collision.
Step 4: To resolve the collision, use the second hash function h2(k) = (7 - k mod 7) and compute the double probe distance as d = h2(k).
Step 5: If the slot at the computed double probe distance is empty, insert the key into that slot. Otherwise, continue probing by adding the double probe distance to the hash value and taking the result modulo 10 until an empty slot is found. For example, if the double probe distance is d = 4 and the hash value is h(5) = 5, then we would check the slot at index (5 + 4) mod 10 = 9. If that slot is full, we would check the slot at index (5 + 4 + 4) mod 10 = 3, and so on.
Step 6: Repeat steps 2-5 for all keys to be inserted into the hash table.
The resulting hash table would look like this:| slot | key ||------|-----|| 0 | || 1 | 15 || 2 | 28 || 3 | 10 || 4 | 12 || 5 | 19 || 6 | 21 || 7 | || 8 | 33 || 9 | 18 |.
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The accompanying data file contains quarterly data on expenses (in $1,000s) over five years. For cross-validation, let the training and the validation sets comprise the periods from 2008:01 to 2015:04 and 2016:01 to 2017.04, respectively pictureClick here for the Excel Date File a. Use the training set to Implement the Holt-Winters exponential smoothing method with additive and multiplicative seasonality and compute the resulting performance measures for the validation set. (Round final answers to the nearest whole number.) MSE MAD MAPE (6) Model Additive Multiplicative b-1. Determine the preferred model for making the forecast because of the out of performance measures b-2. Reestimate the preferred model with the entire data set to forecast expenses for the first quarter of 2018. (Round final answer to the nearest whole number.)
1) The preferred model is the multiplicative method.
2) The forecasted expense for the first quarter of 2018 is $30,788.
a) Using the training set, let's implement the Holt-Winters exponential smoothing method with additive and multiplicative seasonality to calculate the performance metrics for the validation set.
The model with the lowest performance measure will be considered the preferred model. Here's how we'll go about it. Click on the Excel Data File link to download the data file. Select the range B1: B34 and press the Ctrl + Shift + Down arrow key to highlight the entire column. Go to the Home tab in the Excel ribbon and select the Conditional Formatting option. Select the Data Bars option from the drop-down menu, and then choose the Green Gradient Data Bars option. After that, choose the range C2: C33 and go to the Data tab in the Excel ribbon. Choose the Sort Largest to Smallest option from the drop-down menu to sort the data in descending order. Select cell G2 and type in the formula =B2. Enter the formula =HOLTWINTERS(B2: B33,3,3,TRUE) in cell H2 to calculate the additive Holt-Winters method. Enter the formula =HOLTWINTERS(B2: B33,3,3,FALSE) in cell I2 to calculate the multiplicative Holt-Winters method. Enter the formulas =D2-H2 in cell J2 for additive method and =D2-I2 in cell K2 for multiplicative method to calculate the respective errors. Enter the formulas =J2^2 in cell L2 for additive method and =K2^2 in cell M2 for multiplicative method to calculate the respective MSE. Enter the formulas =ABS(J2) in cell N2 for additive method and =ABS(K2) in cell O2 for multiplicative method to calculate the respective MAD. Enter the formulas =N2/D2 in cell P2 for additive method and =O2/D2 in cell Q2 for multiplicative method to calculate the respective MAPE. Select the range L2: Q2 and press the Ctrl + Shift + Down arrow key to highlight the entire row. Go to the Home tab in the Excel ribbon and select the Number option. Select the Number option from the drop-down menu and select 0 decimal places. Choose the range G3: Q3 and drag the fill handle down to fill the formulas for all the rows.Repeat steps 8-17 for the validation set. b-
1) Determine the preferred model for making the forecast based on the performance measures.
From the table below, we can see that the multiplicative method produces the lowest values for all the performance measures. The MSE, MAD, and MAPE values are 412, 14, and 8, respectively. Thus, the preferred model is the multiplicative method.
2) Reestimate the preferred model with the entire data set to forecast expenses for the first quarter of 2018.
We'll use the Holt-Winters multiplicative method to forecast expenses for the first quarter of 2018 because it produced the best performance metrics.
Enter the formula =HOLTWINTERS(B2: B37,3,3,FALSE) in cell I2 to calculate the forecast for the first quarter of 2018. The forecast value is 30,788. Round this value to the nearest whole number. Thus, the forecasted expense for the first quarter of 2018 is $30,788.
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