A used cars salesman is selling a car to a competitive market of buyers, who value the car at v, while the seller values it at v 15. Only the seller knows v, while buyers believe v is equally likely to be L = 80, M = 100, or H = 120. a) Show that the good car, H, cannot be traded in equilibrium. b) Show that there are three equilibria, one in which only bad cars, L, are traded, and two in which both bad and medium cars, L and M are traded. c) Which of the equilibria is the most efficient?