Maximize p = 4.2x + 8.2y + 4z subject to 3.1x + 1.2y + z ≤ 22 x + 2.3y + z ≤ 22 2.1x + y + 2.3z ≤ 20.8 x ≥ 0, y ≥ 0, z ≥ 0. P = (x, y, z) = ([