найти сумму нечётных столбцов двухмерного массива

int[] row1 = { 1, 4, 6, 9, 5, 3, 4, 1, 5, 8, 0, 6, 5, 1, 2, 4, 5, 6, 9, 8, 5, 1, 9, 5, 4, 3, 9 };

int[] row2 = { 1, 4, 5, 9, 5, 3, 3, 1, 5, 8, 5, 6, 5, 1, 2, 4, 5, 6, 9, 4, 5, 1, 9, 8, 4, 3, 9 };

int[] row3 = { 1, 4, 5, 9, 5, 3, 3, 1, 5, 8, 5, 6, 5, 1, 2, 4, 5, 6, 9, 4, 5, 1, 9, 8, 4, 3, 9 };


int[] row4 = { 1, 4, 5, 9, 5, 3, 3, 1, 5, 8, 5, 6, 5, 1, 2, 4, 5, 6, 9, 4, 5, 1, 9, 8, 4, 3, 9 };