12) In a market there are 4 different types of customers (Types: I, II, III, IV) whose willingness-to-pay are presented in the table below and two...

12) In a market there are 4 different types of customers (Types: I, II, III, IV) whose willingness-to-pay are presented in the table below and two goods (A and B) produced by firm X. B's marginal cost $0.60 while A's marginal cost is $0.40. Find a price scheme that allows customers to buy bundles of good A and B optimizing the revenues of firm X. Explain.