What combination of x and y will yield the optimum for this problem? Maximize $10x + $4y, subject to (1) 5x + 3y ≤ 15 and (2) 3x + 6y≤ 18 and (3) x, y ≥ 0. Ox= 3, y = 0 O x = 0, y = 3 O x = 0, y