3. Refer to Figure 16-9. For this firm, the long-run equilibrium quantity of output is a. 100 and the long-run equilibrium price is $90. b. 100 and the long-run equilibrium price is $140. C. 133.33 and the long-run equilibrium price is $56.67. 133.33 and the long-run equilibrium price is $123.33. d. Figure 1 The figure is drawn for a monopolistically-competitive firm. Price MC ATC Demand 140 123.33 90 56.67 100 133.33 MR Quantity