(Average the major diagonal in a matrix) Write a method that averages all the numbers in the major diagonal in an n * n matrix of double values using the following header:    public static double averageMajorDiagonal(double[][] m)    Write a test program that reads a 4-by-4 matrix and displays the average of all its elements on the major diagonal. Here is a sample run: 1  2  3  4.0 5  6.5  7  8  9  10  11  12 13  14  15  16   Average of the elements in the major diagonal is 8.625

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Array

The simplest way to start thinking about an array is as a collection, or a set of elements. In programming, these elements may be constants, variables, functions and pointers.