Suppose the following:
(i) two countries each with demand for a homogeneous good given by P(Q) =40− Q.
(ii) in Country A there is one ?rm with a marginal cost of production of cA.
(iii) in Country B there are two ?rms, each with a marginal cost of production of cB.
(iv) competition in relevant markets is Cournot.
(a) Find for each country expressions for the equilibrium price and ?rm pro?ts and quantity under the assumption that no trade between the two countries occurs.