The graph below summarizes the demand and costs for a firm that operates in a monopolistically competitive market. Instructions: Use the nearest whole numbers on the graph when calculating numerical responses below. S 200- MC ATC 145- 120- 100- MR D 10 12 14 16 18 20 32 24 20 Quantity a. What is the firm's optimal output? unitsb. What is the firm's optimal price? $ c. What are the firm's maximum profits? $ d. What adjustments should the manager be anticipating? O Demand will increase over time as firms exit the market. O Demand will decrease over time as new firms enter the market. Demand will remain unchanged over time