Plot the PPC of a nation given by the following data. All Other Goods Combination A B C D E Health Care 0 25 50 75 100 100 90 70 40 0 a. Calculate the marginal opportunity cost of each combination. b. What is the opportunity cost of combination C? c. Suppose a second nation has the following data. Plot the PPC, and then determine which nation has the comparative advantage in which activity. Show whether the two nations can gain from specializa- tion and trade. Combination A B C D E Health Care 0 20 40 60 65 All Other Goods 50 40 25 SO 0