Python:

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

def sumColumn(m, columnIndex):

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

(Sum elements column by column) Write a function that returns the sum of all the elements in a specified column in a matrix using the following header: def sumColumn (m, columnIndex): Write a test program that reads a 3 4 matrix and displays the sum of each col- umn. Here is a sample run: Enter a 3-by-4 matrix row for row 0: 1.5 2 3 4 Enter Enter a 3-by-4 matrix row for row 1: 5.5 6 7 8 Enter Enter a 3-by-4 matrix row for row 2: 9.5 1 3 1 Enter Sum of the elements for column 0 is 16.5 382 Chapter Multidimensional Lists Sum of the elements for column 1 is 9.0 Sum of the elements for column 2 is 13.0 Sum of the elements for column 3 is 13.0