Q$1)$ write c program that inserts the monthly salary of an employee, then the program will find the net annual salary after deducting the tax based on the following monthly tax rate:Your answer should involves creation of two functions, first one is Net$\_$Annual$\_$Salary, the second function is Tax Amount$1-$if the employee's monthly salary is higher than $10000,$ the tax rate is $20\%\mathrm{.}2-$if the employee's monthly salary is higher than $7000,$ the tax rate is $15\%\mathrm{.}3-$ if the employee's monthly salary is higher than $5000,$ the tax rate is $10\%.$ Otherwise tax rate is $7\%.$The program should enable the user to find the net annual salary for more than one employee each time the program runs, until a $-1$ inserted, then the program prints the net annual salary for all employees.$[$Hint: the net annual salary annual salary$-$ the tax amount$)$