Problem

(Sum elements column by column) Write a method that returns the sum of all the elements in...

(Sum elements column by column) Write a method that returns the sum of all the elements in a specified column in a matrix using the following header:

public static double sumColumn(double[][] m, int columnIndex)

Write a test program that reads a 3-by-4 matrix and displays the sum of each column. Here is a sample run:

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Solutions For Problems in Chapter 8

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