25. Price Discrimination Suppose a monopolist is practicing price discrimination in the sale of a product by charging different prices in two separate markets. In market A the demand function is PA = 100 - 9A and in B it is PB = 84 - 9B where qA and qB are the quantities sold per week in A and B, and PA and PB are the respective prices per unit. If the monopolist's cost function is C = 600 + 4(qA + 9B) how much should be sold in each market to maximize profit? What selling prices give this maximum profit? Find the maximum profit