Adding Rows And Columns In A Matrix?

I have a 5x5 array of which I read from an external file and I am supposed to print out the original matrix and then add up each row and column, proceeding to store them into the sixth positions in my matrix. After that I print out the new matrix.

For example this just using a 2 by 2,

Original
1 2 3 4 5
1 2 3 4 5
New 3 by 3
1 2 3 4 5 15
1 2 3 4 5 15
2 4 6 8 10 30

I am confused as to how to isolate rows and print them out. I know how to add the entire matrix up but isolation is my issue.

Here is what I have including how to read the matrix and the sum of the whole thing

import java.io.*;
import java.util.*; 
public class prog470cAddingRandC {
public static void main (String [] args) {
//read the file
Scanner inFile=null;

[code].....