lQuestion 8 A monopolistically competitive firm faces the following demand schedule for its product. In addition, the firm has total fixed costs equal to 20 . If the firm produces its profit - maximizing level of output and there is a constant marginal cost of $7 per unit, which of the following is incorrect? This firm is not operating at its efficient scale. This firm charges a price of $22 to maximize its profit. This firm earns $25 profit at the profit - maximizing level of output. This firm is in a long - run equilibrium