The market demand curve is QD= 50 - P. The marginal cost curve is MC = 4Q + 6.
a. Supposing the marginal cost curve is for a competitive industry as a whole, find out the profit-maximizing level of output and price.
b. Supposing the marginal cost curve is for only one firm which comprises the entire market, find out the profit-maximizing level of output and price.
c. Compare the two results.