Python program that will send a matrixto a function.In this function, you will return an average value which is the sum of all the elements divided by the total number of the elements. Do not forget to add comments to explain your code.

For example:

-The matrix is:mx = [ [2, 10, 40, 5], [20, 20, 5, 8], [20, 10,4, 6], [7, 20, 3, 10] ]

-Output:Average value= 11.875