Customers arrive at Rich? Dunn's Styling Shop at a rate of 3 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? = customers ?(round your response to two decimal? places).
?b) The average number of customers in the shop? = customers ?(round your response to two decimal? places).
?c) The average time a customer waits until it is his or her turn? = minutes ?(round your response to two decimal? places).
?d) The average time a customer spends in the shop? = minutes ?(round your response to two decimal? places).
?e) The percentage of time that Rich is busy? = percent ?(round your response to the nearest whole? number).