Economics (a) Show hovv a nation's (call it nationl) supply curve of exports of commodity X can be derived from the nation's demand and supply curves of commodity X for P/P above equilibrium in the absence of trade. (b) Show how a nation's (call it nation 2) demand curve for nation 1's exports of commodity X can be derived from the nation's demand and supply curves of commodity X for P/R below equilibrium in the absence of trade