What are the values of A , b , and c in the matrix addition? the 4 by 3 matrix, row 1, column 1, 4 column 2, 1 column 3, negative 5 row 2, column 1, negative 10 column 2, 2 column 3, 13 row 3, column 1, 3 column 2, 3 column 3, 0 row 4, column 1, negative 8 column 2, negative 9 column 3, 6 plus the 4 by 3 matrix, row 1, column 1, negative 8 column 2, 0 column 3, 6 row 2, column 1, negative 4 column 2, 5 column 3, negative 1 row 3, column 1, 15 column 2, negative 12 column 3, 3 row 4, column 1, 0 column 2, negative 3 column 3, 11 is equal to the 4 by 3 matrix, row 1, column 1, negative 4 column 2, 1 column 3, 1 row 2, column 1, A column 2, 7 column 3, 12 row 3, column 1, 18 column 2, b column 3, 3 row 4, column 1, negative 8 column 2, c column 3, 17