I'm having a bit of trouble understanding this part.

(2) [Gains from trade: 80 pts] Mexico and the United States can each produce tomatoes and corn. They each face a tradeoff between these two kinds of goods because each has limited land and other resources. Their production possibility (PP) curves are shown below. 8 Mexico V United States Tomatoes OHNWA UO 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Cornh. What is Mexico's opportunity cost of a unit of corn? That is, if Mexico were already producing somewhere on its PP curve, and decided to increase production of corn by one unit, how many units of tomatoes would it have to give up producing? i. What is the United States' opportunity cost of a unit of corn? j. What is Mexico's opportlmity cost of a unit of tomatoes? That is, if Mexico were already producing somewhere on its PP curve, and decided to increase production of tomatoes by one unit, how many units of corn would it have to give up producing? It. What is the United States' opportunity cost of a unit of tomatoes? 1. Which country has a comparative advantage in producing corn? m. Which cauntry has a comparative advantage in producing tomatoes? n. is it possible for Mexico and the United States to trade corn and tomatoes so that both countries can consume combinations of tomatoes and corn outside their respective nroduction-nossailities curves? Answer \"YES" or \"NO."