Pregunta: Solve the following problems using the B&B method. a) Max z=5x + 2y s.a 3x +y ≤ 12 x +y ≤ 5 x, y ≥ 0, x and y integers b) Max z = 2x + 3y s.a x + 2y ≤ 10 3x + 4y ≤ 25 x, y ≥ 0, x and y integers c) Max z = 4 x + 3 y s.a 4 x + 9y ≤ 26 8 x + 5 y ≤ 17 x, y ≥ 0, x and y integers