P= MF 17. This firm is earning - at its profit-maximizing level of output: (a) Positive economic profit (b) Zero economic profit (c) Negative economic profit (d) There is not enough information to answer the question 18. This firm would produce additional output if: (a) AFC declines (b) Marginal cost increases (c) ATC increases (d) Market price rises Refer to the figure below to answer the following questions: 19. p" reflects: (a) Surplus price (b) Equilibrium price (c) Shortage price 520. At p* quantity demand is: (a) Less than quantity supplied (b) Greater than quantity supplied (c) Equal to quantity supplied (d) There is not enough information to answer the