Write an Matlab script, and post the script and the resluts.

Write a used-defined function that calculates the average and the standard deviation of a list of numbers. Use the function to calculate the average and the standard deviation of the following list of grades: 80 75 91 60 79 89 65 80 95 50 81 The standard deviation is given by: sigma = Squareroot sigma^i = n_i = 1 (x_i - x_ave)^2 - 1 DO not use built-in functions to calculate the mean and the standard deviation