Write a single c++ program that contains two functions: 1. first function: void minandmax () pre-condition: the function takes five integers as parameters post-condition: the function returns the maximum and minimum of a, b, and c values back to the main function. 2. second function: double findavg pre-condition: the function takes three integers as parameters post-condition: the function returns the average (double) for these three integers back to the main function generate three random integers between 1 and 100 in the main() and call both minandmax and findavg functions from the main funetion as well.