Draw a graph of the demand and supply of U.S. dollars in exchange for Japanese yen to illustrate each of the following situations.

a. Sales of Apple iPhones and iPads soar in Japan.

b. The interest rate on one-year Japanese government bonds rises relative to the interest rate on one-year U.S. Treasury bills.

c. The Japanese government runs huge budget deficits, and investors believe that the government may default on its bonds.