Assignment Specifications

$1.$ You will develop a Python program which calculates details for a mortgage loan for one or more houses

based on the input variables described in detail below.

$2.$ The program will first print a simple welcome message and the main prompt $($both messages are stored in the

variables WELCOME$\_$TEXT and MAIN$\_$PROMPT in the starter code$),$ and then repeatedly ask if the user wishes

to process another mortgage. If the user$$s response is the letter Y or the letter y$,$ the program will proceed with

the steps to calculate the values associated with a new set of inputs for a mortgage loan. If the user$$s response is

anything else, the program will quit.

$3.$ When the user chooses to process a mortgage loan, the program will prompt the user to enter the desired

location of the house, the desired square footage of the house, the user$$s maximum monthly payment, the user$$s

expected down payment, and the current APR. You should use the prompts provided for each of these inputs in

the file $$strings$.$txt$$ or in the starter code $($zip file$)$ and defined as LOCATIONS$\_$TEXT,

SQUARE$\_$FOOTAGE$\_$TEXT, MAX$\_$MONTHLY$\_$PAYMENT$\_$TEXT, DOWN$\_$PAYMENT$\_$TEXT, and

APR$\_$TEXT, respectively. Users will be advised to enter as much information as possible or $$NA$$ if they don$$t

have a value to input. The program will behave in response to which values are present and which are missing.

$4.$ For each of the inputs, handle the input as follows.

For location, the user must provide one of the following cities: Seattle, San Francisco, Austin, East

Lansing. The starter file contains the corresponding property tax rates and real estate prices per square

foot for each of these locations. If the user enters any other value, use the average national values for

those two metrics $($defined as AVERAGE$\_$NATIONAL$\_$PROPERTY$\_$TAX$\_$RATE and

AVERAGE$\_$NATIONAL$\_$PRICE$\_$PER$\_$SQ$\_$FOOT$)$ and display the unknown location message $($the

message is stored in the variable LOCATION$\_$NOT$\_$KNOWN$\_$TEXT in the starter code$).$

For this project, we assume that all inputs are valid:

$-$ For square footage, you may assume the user has entered a positive value or $$NA$.$ If the value is

numerical, convert it to a float; Otherwise, it means the user did not provide a square footage.

$-$ For maximum monthly payment, you may assume the user has typed a positive value or $$NA$.$ If

the value is numerical, convert it to a float; Otherwise, it means the user did not provide a

monthly payment.

$-$ For down payment, you may assume the user has typed a positive value or $$NA$.$ If the value is

numerical, convert it to a float; Otherwise, you should assign the variable a float value of $0\mathrm{.}0$

$-$ For APR, you may assume the user has typed a positive value between $0$ and $100$ or $$NA$.$ If it

is numerical, convert it to a float and store it for use in your calculations as a fraction instead of

percentage $($i$.$e$.,$ not as you would display it$,$ nor as the user typed it$)$; otherwise, assign the value

stored in the APR$\_2023$ constant that has been provided.

What kind of calculations and what results to display depends on if the user entered the square footage

only $($case $1),$ the square footage and the maximum monthly payment $($case $2),$ the maximum monthly

payment only $($case $3),$ or neither the square footage nor the maximum monthly payment were provided

$($case $4).$

Case $1$: square footage only

If the user has provided the square footage only, you will compute the details of the mortgage loan given

the values of the other variables $($presuming those values are valid$).$ You should first estimate the home

cost for the given location based on the corresponding values. You will also need to calculate the

CSE $231$ Spring $2024$

principal value based on the estimated home cost and the down payment. Check the $$assignment notes$$

section below for all the necessary formulas.

Mortgage loan information will be displayed containing all the provided information as well as the

monthly taxes and the monthly payment. The message should be displayed like the one shown below.

In the starter code, we provide an incomplete string that you need to fill in with the correct formatting

for numbers using the example message below $($in red$).$ You can use either the $.$format$()$ method or

fstrings. Note that all whole numbers in the outputs are floats that were rounded with precision $0.$

Do not convert to integers because it will truncate the floats and not round.

In Austin, an average $1,000$ sq$.$ foot house would cost $$349,000.$

A $30-$year fixed rate mortgage with a down payment of $$50,000$ at $4\mathrm{.}0\%$ APR results

in an expected monthly payment of $$526\mathrm{.}41($taxes$)+$ $$1,427\mathrm{.}47($mortgage payment$)=$ $$1,953\mathrm{.}88$

Finally, ask the user if they wish to see the amortization table for the mortgage loan $($using the string

stored in the variable AMORTIZATION$\_$TEXT$).$ An amortization table shows how the monthly payment

will be allocated each month. Some of the payment is directed to pay off the interest owed on the loan,

and the rest goes to reduce th