The Chop Shop barber salon in West U, two hairstylists, Francois and Mimi, along with two assistants, Bernard and Lulu, cater to busy professionals seeking respite from hipster salons in Montrose. The salon operates from 6:45 a.m. to 9:00 p.m. to accommodate diverse wor k schedules, offering only shampooing and hairstyling services. Below are the activities, corresponding activity times, and the assigned employee for each task: Check-In which takes 3 minutes, by Bernard or Lulu. Next task is Shampoo, which takes 10 minutes by Bernard or Lulu. Next task is Styling, which takes 20 minutes, by Francois or Mimi. Final task is Billing, which takes 5 minutes, by Bernard or Lulu a) What is the number of customers that can be serviced per hour in this hair salon? b) Regrettably, Lulu has been involved in a car accident, resulting in an arm injury that necessitates wearing a cast for the next two weeks. Consequently, she will be unable to assist with shampooing during this period, but she will still work and help with billing and check - in processes. How does this impact the overall capacity of the process? Please calculate and provide the maximum process capacity.