Write a program that includes two functions named calcavg() and the calcavg() function should calculate and return the average of the values stored in an array named testvals. the array should be declared in main() and prompt the user for ten values. the variance() function should calculate and return the variance of the data. the variance is obtained by subtracting the average from each value in testvals, squaring the differences obtained, adding their squares, and dividing by the number of values in testvals. the values returned from calcavg() and variance() should be displayed using printf() function calls in sample output:
enter test score 1: 100
enter test score 2: 98

The purpose of this problem is to write some small functions and practice passing things around amoung functions.1) the main function shall ask the user to enter three numbers and read the three numbers.2) write a function named findsum that takes three numbers as arguments and returns their sum. the main function shall call this function.3) write a function named findaverage that takes the sum and the number of numbers and returns the average. the main function shall call this function.4) write a function named findsmallest that takes the three numbers and returns the smallest value. the main function shall call this function.5) the main function shall print the results in the following format, with two decimal positions and the decimal points aligned: