3) All firms in a competitive industry have the following long-run total cost curve: where q is the output of the firm. C(q) = q3 - 10q2 + 36q a. Compute the long-run equilibrium price. What does the long-run supply curve look like if this is a constant-cost industry? Explain. b. Suppose the market demand is given by Q = 111-p. Determine the long-run equilibrium number of firms in the industry.