It takes a barber 15 minutes to serve one customer. Note: Round your answers to 2 decimal places. a. What is the capacity of the barber expressed in customers per hour? b. Assuming the demand for the barber is 3 customers per hour, what is the flow rate? c. Assuming the demand for the barber is 3 customers per hour, what is the utilization? d. Assuming the demand for the barber is 3 customers per hour, what is the cycle time