Bridgeview Salon Has a Variable Demand

Bridgeview salon has a variable demand.The daily demand ranges from 150-190 customers a day with an average of 5 services purchased.The average daily demand is 170 customers.The salon operates 12 hours each day,and each service takes an average of 4 minutes.(a) Calculate the average waiting time in minutes,and (b) the cycle time for a service order.(c) Bridgeview management is considering extending the hours of the salon to 15 hour days,what affect will this change have on average waiting times?

A) 34 minutes; (b) 38 minutes; (c) The average wait time would decrease to 6.2 minutes.
B) 28 minutes; (b) 33 minutes; (c) The average waiting time would not change.
C) 24 minutes; (b) 29 minutes; (c) The average waiting time would decrease by 7 minutes.
D) 30 minutes; (b) 33 minutes; (c) The average waiting time would increase by 4 minutes.
E) 22 minutes; (b) 25 minutes; (c) There is not enough data to answer this question.