we should use c program

Question 3 (25 points) Declare an integer array of size 10. Ask the userto populate the array and then calculate the followingby reading the numbers from the array: sum of the elements in the array, average of the elements, variance of the elements Then display all of the above on the screen on a separate line. Use the followingformula to calculate variance: s2 (; 7)? n - 1 = sample variance 2 = the value of the one observation 1 = the mean value of all observations TI = the number of observations Do not use any built-in functions for calculating sum, average and variance in your code