[10 marks]. Suppose that the assumptions of the Ricardian model are satisfied. The two goods are food and manufactures. The home country needs 1 unit of labour to produce a unit of food and 2 units of labour to produce a unit of manufactures. The foreign country needs 3 units of labour to produce a unit of food and 4 units of labour to produce a unit of manufactures. a. Assuming that both goods are consumed, what is the price of food relative to manufactures (pf/Pm) in each country prior to trade? b. Which country exports food in free trade? Why