User defined functions

Modify program sample $3\mathrm{.}5$ code to use user defined functions. You must have two function declarations, two definitions and two function calls. Also, this program should loop as long as the user types in y or $Y$ for yes. Make sure you include comments on each function declaration, function call, function definition and do while loop.

This program outputs the amount of state income tax due computed as follows: no tax on income up to $$15,000$;$5\%$ on income between $$15,001$ and $$25,000$; $10\%$ on income over $$25,000.$

Enter net income $($rounded to whole dollars$)$ $$10000$

Net income $=$$$10000$

Tax bill $=$$$0\mathrm{.}00$

Do you want to run again?

y

Enter net income $($rounded to whole dollars$)$ $$18000$

Net income $=$$$18000$

Tax bill $=$$$150\mathrm{.}00$

Do you want to run again?

$y$

Enter net income $($rounded to whole dollars$)$ $$30000$

Net income $=$$$30000$

Tax bill $=$$$1000\mathrm{.}00$

Do you want to run again?

Display $3\mathrm{.}5$: