Consider the market for music downloads. The market demand curve is given by P=10-(1/6)Q
Where Q is the number of downloads sold per hour and P is the price per download. Apple is the dominant firm in this market with constant marginal costs MC=6. There are three follower firms that also produce music downloads, each with marginal costs given by MC=6+(1/2)Q, where Q is the output per follower firm per hour. Determine Apples optimal output, the price they will charge, and the output for each of the follower firms.