At first, the program shall obtain four user inputs: $($a$)$ property price $,($b$)$ loan ratio $,($c$)$ yearly

interest rate $,$ and $($d$)$ number of years $$ of the mortgage.

$2.$ The above inputs are valid only if all the following conditions are met:

$$ property price is positive; and

$$ loan ratio is positive but at most $1$; and

$$ yearly interest rate is positive; and

$$ number of years is positive.

In case any of the inputs is invalid, the program shall print a warning message and then

terminate.

$3.$ Otherwise, the down payment $,$ loan amount $,$ and monthly payment $$ shall be computed and

displayed.

$4.$ Next, the program shall obtain one more user input: $($e$)$ the number of monthly payments made

$.$

$5.$ This input is valid only if it is at least $0$ but smaller than $.$ In case this input is invalid, the

program shall print a warning message and then terminate.

$6.$ Otherwise, the amount still owed and total interest paid after $$ months shall be determined and

displayed.

You can assume that user inputs $($a$)($c$)$ are always entered as floating point numbers and user

inputs $($d$)-($e$)$ are always entered as integers. Therefore, you can use the double data type for

storing $($a$)-($c$)$ and the int data type for storing $($d$)-($e$).$

When doing power calculations $($

$$

$),$ you can use the C$++$ function pow$(...,...).$ You must

#include at the top of your program before using it$.$

When printing the down payment, loan amount, monthly payment, amount still owed, and total

interest paid, the numbers shall be printed in fixed point notation $($never scientific notation$)$ and two

decimal places. This can be done by:

cout $<<...<<$ fixed $<<$ setprecision$(2)<<$ number$\_$to$\_$be$\_$printed;

To use the above, you must #include at the top of your program.