Many restaurants don't take reservations. You simply arrive and wait your turn. If you arrive at 7:30 in the evening, you have at least an hour wait. Notwithstanding that fact, a few people arrive speak quietly with the maitre d', hand him some money, and are promptly seated. At some restaurants that do take reservations, there is a month wait for a Saturday evening, three weeks for a Friday evening, two weeks for Tuesday through Thursday, and virtually no wait for Sunday or Monday evening. How do you explain these events using demand and supply