$9.($General math$)$ a$.$ Write, run, and test a C$++$ program that accepts a user$-$input integer num$-$

ber and determines whether it$$s even or odd. Display the entered number and the message

Even or Odd.

b$.$ Modify the program written for Exercise $9$a to determine whether the entered number is

evenly divisible by a user$-$specified value, with no remainder. That is$,$ is it evenly divisible

by $3,7,13,$ or any other user$-$specified value?