Each Problem is worth 5 points. Problem 1 Mukhtar is a potato farmer. He invests all his spare cash, totaling $200, in additional potatoes, which grow on otherwise useless land behind his barn. The potatoes double in weight during their rst year, after which time :hey are harvested and sold for $400. Mukhtar's friend Ismail asks Mukhtar for a loan of $200, which promises to repay after 1 year. How much interest will Ismail have to pay Mukhtar in order for Mukhtar to recover his opportunity cost of making the loan