The length of time that a person owns a car before buying a new one has an Erlang- 3 distribution with a mean of 5 years. Suppose that there are approximately 150 million cars in the United States. i. Assuming that a person's old car is destroyed when he or she buys a new car, how many cars does the auto industry expect to sell each year? ii. Now suppose that a person's old car is sold to somebody else when that person buys a new car. The person who buys the used car keeps it for a period of time that follows an Erlang-3 distribution with a mean of 7 years. When that person buys another used car, his or her previous used car is assumed to be destroyed. Under the same previous assumptions, how many new cars does the auto industry expect to sell each year