Consider the diagram below: 10,000 Point F 8,000 Marginal cost E Isoprofit curve; $63,360 Price, marginal cost ($) Isoprofit curve: $30,000 Isoprofit curve: $0 Demand curve Q' 50 100 120 Quantity of cars, Q a. What does the isoprofit curve = $63,360 show? b. Why is the slope of the isoprofit curve negative? c. Why is the profit of the lowest isoprofit curve = $0? d. Why does point E represent the profit maximizing price and quantity for this firm? e. Why does point F not represent the profit maximizing price and quantity for this firm? f. Is Point E Pareto-efficient? (Consider that this firm does not have to charge one price for all customers, Price discrimination.)