Solve 2,3,4 please. It's urgent.

2. The following data are the production of USA & UK by using per hour of labor U.S.A U.K Wheat 4 1 Cloth 3 2 If United States exchanges 4W for 4C with United Kingdom then answer the following: a. Which theory can explain this trade? b. Using law of comparative cost find out the gain of USA and UK in terms of wheat c. Calculate the range of mutually beneficial trade. 3. Why complete specialization is not possible under increasing opportunity cost whether the trading countries are small or large? 4. Does Mercantilist theory still alive in 21 st century