How would write this java program? and please include comments. Thank you

1. An nx n matrix is called a positive Markov matrix if each element is positive and the sum of the elements in each column is 1. Define the following method to check whether a matrix of double values is a positive Markov matrix public static boolean isMarkovMatrix (double ] m) Write a test program that prompts the user to enter a 3 x 3 matrix of double values and reports whether it is a positive Markov matrix. Sample run #1: Enter a 3 by 3 matrix, row by row: . 15 0 . 875 0, 375 0.55 0.005 0.225 0.30 0.12 0.4 This is a positive Markov matrix Sample run #2: Enter a 3 by 3 matrix, row by row: 0.95-0.875 0.375 0.65 0.005 0.225 0.30 0.22 -0.4 This is not a positive Markov matrix