5. The following diagram shows a fall in demand from D1 to D2 in a price-searcher's market. '1 Quantity Do we know if the price charged by the price search will rise or fall? 6. Price Discrimination Apple sells MacBook in both the domestic (d) and foreign (f) markets. Because of differences in the power supplies, a MacBook sold in one market cannot be used in the other market. The demand curves associated with the two markets are as follows: Pd = 20000 200 Pf = 25000 50Q Apple has a constant marginal cost in producing MacBook at 1000. There is no fixed cost of production. a. Derive the marginal revenue curves (i.e., how total revenue changes with Q) for Apple in both markets. b. If Apple charges different prices in the two markets, how much should Apple charge to maximize profits? And What are Apple's total profits