Q4: (3 points) Write a matlab script that calculates the average and standard deviation of a list of grades. The user need to enter the grade as elements of a vector the program has to calculate the required quantities using matlab's inbuilt functions such as mean and std. the results need to be displayed in the command window execute the program and enter the following grades-93.77. 51, 62, 99, 41, 82, 77, 71,68, 100, 46, 78, 80 and 83