please can you do this in c++ and expain it to me

Problem Description Create a program to find the standard deviation. Step 1: - Create a function with an array as parameter. - Inside the function, find the sum of all the array elements. - Compute the mean of array elements. - Find the difference of each array value and mean. - Compute the square of each difference using - Add all the squared differences and assign to - Compute the by dividing the by 5. - Compute the square root of using and assign it to - Return sa . Step 2: - Inside main(), get 5 integer input values for an array numbers. - Call calculate_So() with the array as argument. - Print the returped value. Example Test Input 9 12 21 11 14 Expected Output 4.128