A monopolist faces the following demand:
P = 209 - 16.8Q
Due to new regulations, the marginal cost of the product is uncertain. The firm believes the marginal cost of their product will be $19 with the new regulation. Otherwise, they believe the marginal cost for their product will be $7. The firm estimates the probability of the new regulation being enforced is 0.5. Find the firm's profit-maximizing level of output. Round your answer to one decimal.