Consider a firm with market power that has the following demand function and marginal revenue and marginal cost functions. What can be said about the firm's economic profits at the profit-maximizing price and quantity? A coordinate plane relates dollars along the y axis to quantity along the x axis, and represents 3 straight lines. Group of answer choices The firm should shut down. Economic profits are positive. Economic profits are zero. Additional information is needed to determine the economic profits. Economic profits are negative