Benny the Barber is considering the addition of a second chair. Customers would be selected for a haircut on an FCFS basis from those waiting. Benny has assumed that both barbers would take an average of 1898 minutes to give a haircut, and that business would remain unchanged with customers arriving at a rate of two per hour. Find the following information to help Benny decide if a second chair should be added:

e1. The average number of customers waiting.

e2. The average time a customer waits.

e3. The average time a customer is in the shop.

e4. Do you think adding the 2^nd chair is justified? Why/ why not?

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