Two firms (A and B) compete producing an identical product with an inverse market demand given by p = 90-Q, where Q is the sum of the two firms' outputs. Marginal cost is zero for both firms. Each firm has fixed costs of $500. In the Cournot Nash equilibrium, firm A will Q a) produce 60 units of output and will make profits of 900 Q b) produce 60 units of output and will make profits of 800 O c) produce 30 units of output and will make profits of 200 O d) produce 30 units of output and will make profits of 400 Q e) produce 30 units of output and will make profits of 800