Consider the following code segment:

int[][] mat = new int[3][4];

for (int row = 0; row < mat.length; row++) {

for (int col = 0; col < mat[0].length; col++) {

if (row < col) {

mat[row][col] = 1;

}

else if (row == col) {

mat[row][col] = 2;

}

else {

mat[row][col] = 3;

}

}

}

What are the contents of mat after the code segment has been executed?