(2) Assume that the monetary base is $100 bilion, the reserve-deposit ratio is 0.1, and the currency-deposit ratio is 0.1. The money supply is $500 billion.

(3) In a duopoly if the firms have agreed to jointly maximize profits, then each firm can increase its current profits by producing more. Use the following table to answer question (4) and (5). Listed in the table are the long-run total costs for two firms.