Fantastic Styling Salon is run by two stylists, Jenny Perez and Jill Sloan, each capable of serving five customers per hour, on average. Fight customers, on average, arrive at the salon each hour.

a. If all arriving customers wait in a common line for the next available stylist, how long would a customer wait in line, on average, before being served?

b. Suppose that 50 percent of the arriving customers want to be served only by Perez and that the other 50 percent want only Sloan. How long would a customer wait in line, on average, before being served by Perez? By Sloan? What is the average customer waiting time in the line?

c. Do you observe a difference in the answers to parts (a) and (b)? If so, why? Explain.