Fabulous footwear employs three salespeople, and pays time-and-a-half for overtime. weekly paychecks are distributed on the tuesday following the last day of the week (saturday). fabulous footwear withholds income tax (20%), fica—oasdi (6.2%), and fica—medicare (1.45%). fabulous footwear also pays payroll taxes for fica—oasdi (6.2%), fica—medicare (1.45%), and state and federal unemployment (5.4% and 0.6% respectively). the payroll data for the three salespeople for the week ended march 31 follows:

Customers arrive at rich dunn's styling shop at a rate of 3 per hour, distributed in a poisson fashion. rich can perform an average of 5 haircuts per hour, according to a negative exponential distribution.a) the average number of customers waiting for haircuts= customersb) the average number of customers in the shop= customersc) the average time a customer waits until it is his or her turn= minutesd) the average time a customer spends in the shop= minutese) the percentage of time that rich is busy= percent