Problem PS7.2.4 point possible (graded) Now, let's go back to the case where all firms have the same cost function. In class we saw the Cournot competition model for two firms. Now, we are going to get you through the Cournot model with three firms. Assume that demand for a good is given by p = a - bQ, and that there are 3 firms competing in quantity with a constant marginal cost c