i need sum of variables around 2,2 , print out. i have no idea on how this. please help! code far: import java.util.*; import java.io.*; public class matrixsumming { private int[][] m = {{5,6},{7,8},{3,4}}; //load in matrix values public int sum( int r, int c ) { return 0; } public string tostring() { return ""; } } here runner import java.io.file; import java.io.ioexception; import java.util.scanner; import static java.lang.system.*; public class matrixsummingrunner { public static void main( string args[] ) throws ioexception { //scanner file = new scanner (new file("matsum.dat")); int[][] mat = {{0, 0, 0, 0, 0, 0, 0}, {0, 1, 2, 3, 4, 5, 0}, {0, 6, 7, 8, 9, 0, 0}, {0, 6, 7, 1, 2, 5, 0}, {0, 6, 7, 8, 9, 0, 0}, {0, 5, 4, 3, 2, 1, 0}, {0, 0, 0, 0, 0, 0, 0}}; } } i tried finding couldn't find similar in matrix. do re...