Patients call a suburban hospital's "health-line" at the rate of 18 per hour on Monday mornings. The distribution of calls can be approximated by the Poisson distribution. Nurses that staff the "health-line" spend approximately three minutes talking with patients on each call and directing them to other appropriate resources, and such service times are approximated by an exponential distribution. Currently, there is one nurse that staffs the "health-line" on Monday mornings. Use the appropriate Excel queuing template to answer the following questions pertaining to queue performance: A. System utilization B. Average number of patients waiting in line for service C. Average time patients spend waiting in line for service D. Average time patients spend in the system E. Does the current system require an additional nurse to manage current workload? Explain why or why not