The accompanying diagram shows the effects of a tariff. Initially, the price is Po, domestic firms produce Qo units, and Q - Qo units are imported from foreign firms. When the tariff is imposed, the price increases to Po+t. Price Po+ Po C A B [1] E F S D - Quantity a) Show the consumers' surplus and producers' surplus before tariff is imposed. [10'] b) Show the consumers' surplus and producers' surplus after tariff is imposed. [10'] c) How does the tariff affect consumers' surplus and producers' surplus? [10'] d) How much tariff revenue is collected by the government? [10'] e) Does imposing the tariff cause the country's social gain to rise or fall? [5']