$***$DRAW THE GRAPH $****$

Use the following information on the supply and demand for oil in the hypothetical country Economica to answer the questions below. Assume that the demand and supply curves are linear.

Assume that Economica is a small country and that the world price of oil is $$40$ per barrel.

a$.$ Calculate producer and consumer surplus under autarchy $($no trade$).$

b$.$ Calculate producer and consumer surplus assuming free trade.

c$.$ Calculate the gains from trade.

d$.$ Draw the import demand and export supply curves for Economica.

Show the coordinates of at least two points on the import demand curve. Use may use the template at the end of the problem set or draw your own graph.