Two firms constitute the entire doghouse industry. One has the long-run cost function c1(y) = 3 + 4y 2/3 for y > 0 and c1(0) = 0, and the other has the long-run cost function c2(y) = 10 + y 2/10 for y > 0 and c2(0) = 0. If no new firms can enter the industry, show that at price p = 3 only one firm will operate.