Consider a world consisting of two countries, Ghana and Canada. Suppose the domestic demand and-supply curves for bicycle in Ghana are given by the following equations:

Demand: P = 80 - 2Q

Supply: P =5 + 3Q

current price is $50

(d) If a tariff of 20 percent is imposed on imports from Canada, by how much do consumption and domestic production change? How much revenue does the government earn from the tariff?