problem 4.8 please and thank you so much. a and b.

4. 8 The current spot exchange rate is So$ 1$ = $ 190 / $ and the 1- year forward rate is F, $ 15 = $ 210 / 5. The prime rate in the United States is 15 percent . 2 . What should the Japanese prime rate be ?" b. According to forward parity , by how much should the dollar change in value during the next year