III.23. Selling cars. Bill sells new cars in a small town for a living. On a weekday afternoon, he will deal with one customer with probability 0.6, two customers with probability 0.3, and three customers with probability 0.1. Each customer has probability 0.2 of buying a car. Customers buy independently of each other.

Describe how you would simulate the number of cars Bill sells in an afternoon. You must first simulate the number of customers, then simulate the buying decisions of one, two, or three customers. Simulate one afternoon to demonstrate your procedure. (Hint: See page 452.)