1. Customers arrive at Rich Dunn's Styling Shop at a rate of 4 per hour, distributed in a Poisson fashion. Service times follow a negative exponential distribution, and Rich can perform an average of 5 haircuts per hour. a) The average number of customers waiting for haircuts b) The average number of customers in the shop [ c) The average time a customer waits until it is his or her turn= d) The average time a customer spends in the shop | e) The percentage of time that Rich is busy = customers (round your response to two decimal places). customers (round your response to two decimal places). minutes (round your response to two decimal places). minutes (round your response to two decimal places). percent (round your response to the nearest whole number).