Consider a two-country world. Each country has an upward-sloping national supply curve for raisins and a downward-sloping national demand curve for raisins. With no trade in raisins, the no-trade equilibrium price for raisins in one country would be

\($2.00\) per kilogram and the no-trade equilibrium price for raisins in the other country would be \($3.20\) per kilogram. If the countries allow free trade in raisins, explain why \($3.50\) per kilogram cannot be the free-trade equilibrium world price for raisins.

In your answer, draw and refer to graphs of supply and demand curves for the two national markets.