A seller (S) wants to sell a used care to a buyer (B). S’s knows the quality r of the care while B just knows that the car is of high quality, rh=10, with a probability of q and of low quality, rl=5, with a probability of 1-q; B decides the price to buy the car and S decides whether to sell or not;Assume that the value of care for both S and B is r. The (net) utility of S and B are us=p-r and ub=r-p.