Customers arrive at Rich Dunn's Styling Shop at a rate of 3 per hour, distributed in a Poisson fashion. Rich's service times follow a negative exponential distribution, and Rich can complete an average of 5 haircuts per hour. 1. Find the average number of customers waiting for haircuts. .5 2. Find the average number of customers in the shop. 3. Find the average time a customer waits until it is his or her turn. 4. Find the average time a customer spends in the shop. 5. Find the percentage of time that Rich is busy