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2. To become productive, Regal Airlinies is interested in setting standards for the time the telephone reservation clerks spend with customers making flight arrangements. They want to track performance and are proposing setting up a process control chart for telephone reservations. They tracked four different clerks for five days and the data is presented below. The time is in minutes spent on the phone doing reservations. Clerk Mon Tues Wed Thurs Fri Alice | 15 | 21 22 23 | 20 Bill L 16 15 22 200 Janice 23 20 Mike 18 16 19 22 24 23 19 a) Establish upper and lower control limits for the average time spent per day on the phone doing reservations. b) Establish upper and lower control limits for the range of time spent per day on the phone doing reservations. c) Are all the clerks currently doing a reasonable job managing their time on the phone? d) A fifth clerk, Carl, spends on average 14 minutes per day and with a range of 14 minutes on the phone doing reservations. Is his performance within acceptable limits