3) Marcos's brother, Luis provides orthodontics services in the rural area in which he and Marcos live. Professionally, Luis feels somewhat lonely. His closest colleague is quite far away. He says orthodontists in the city must be happier, able to meet up for lunch with colleagues to "talk shop," etc. a) Suppose Luis faces the following demand curve for his services: Q=40-1/2P, where Q is patients per day. Do Marcos and Luis differ in terms of market power? Where does Luis's market power originate? Why might Luis's demand curve slope downward? b) Luis's cost function is TC=60+30Q. What types of fixed costs does an orthodontist have? What is Luis's profit-maximizing level of output? Find it by filling the following table, and by plotting D, MR, MC, and AC on the axes in the figure below the table.Q D TC AC MC TR MR Profit 78 74 72 70 68 8 8 8 5 8 8 8 8 O 10 15 20 25 30 35 40 d) Is there deadweight loss in this market? Label it if so. Explain DWL to your brother in this setting. e ) Should Luis exit this business? f) Do you expect entry? g) Luis hears that a couple-both of whom are orthodontists!-is moving to town. What might he expect will happen to his demand curve