using matlab

Exercise 5 Create the following 2D array: A=[2 4 9; 7 0 8; 3 5 1]. Using a nested for loop, find the mean value of the entire 2D array. Count the number of elements using your own counter variable, i.e., do not use, for example, built-in functions such as size or length. Place your code into a .m file Note: In addition, do not use any built-in functions such as sum or mean