For a particular product, Country A's supply and demand are represented by the following functions:Q_s= 0 + P; Q_d= 52 - P. Suppose Country A is a small country (it takes the world price as given) and the free-trade world price is $10.

Numerical answers are required for the questions.

(1) If the government of Country A imposes a 100% tariff on the imports, how much does Country A import?

(2)Moving from free trade to the 100% tariff, by how much does the consumer's surplus change? (Positive number means a gain; a negative number means a loss)

(3)Moving from free trade to the 100% tariff, by how much does the producer's surplus change? (Positive number means a gain; a negative number means a loss)

(4) Moving from free trade to the 100% tariff, what is the deadweight loss for Country A caused by the tariff?