Econ help

Question 17 1.5 pts Consider a competitive industry with a market demand curve of P = 270 - Q, where P is market price and Q is the quantity demanded in the market. In the short run there are 4 firms in the industry, and each firm has a total cost function of TC = 144 + 6q + q2, where q is output of the individual firm. In the long-run market equilibrium what is the number of firms in the industry? 20 O None of the other answers are correct. O 8 16 12