The Errata Book Company is a firm that sells its book to two types of consumers, type 1 and type 2. The marginal revenue Errata gets from type 1 consumers is: MR1 = 20 - 2Q1, and the marginal revenue Errata gets from type 2 consumers is: MR2 = 15 - 3Q2. If the marginal cost of producing a book is constant at $6, how much will this firm want to sell to each consumer type? Also, what price will it charge each consumer type?