9 . Perfect Competition The market for peanut butter in Nutville is monopolistically competitive and in long-run equilibrium. The following graph shows the marginal-cost (MC) curve and the average-total-cost (ATC) curve for a peanut-butter-producing firm. It also the demand curve and marginal-revenue (MR) curve faced by a firm operating in a monopolistically competitive environment. On the following graph, use the black point (plus symbol) to show the profit-maximizing output and price for a typical firm operating in a monopolis competitive environment. Demand Profit Max Under MC Perfect Comp. Outcome Price, Cost, Revenue ATC MC MR Quantity One day, consumer advocate Skippy Jif discovers that all brands of peanut butter in Nutville are identical. Thereafter, the market becomes perfectly competitive and again reaches its long-run equilibrium. On the previous graph, use the grey point (star symbol) to show the market price in this case and the quantity produced by each firm. Which of the following statements are true for a typical firm in this market given the transition from monopolistic competition to perfect competition? Check all that apply. Marginal cost remains unchanged. The price remains unchanged. Profit decreases. The quantity increases. Average total cost decreases