=12.13. Refer to the first 100 minutes of the computer simulation of the current operation of Herr Cutter’s barber shop presented in Figure 12.7 and summarized in Figure 12.8. Now consider the alternative of adding an associate. Perform a simulation of this alternative by hand by using exactly the same interarrival times (in the same order) and exactly the same service times (in the same order) as in Figure 12.7.