Consider an urgent care center with 4 doctors where the average arrival rate for each doctor is 24 patients per hour and the average service time of each patient is 2 minutes. Both inter-arrival times and service times have a coefficient of variation equal to one Initially, each doctor serves his or her own patients. How many minutes does a patient spend on average in the urgent care center fincluding the time waiting in line as well as the actual. service)? Fil in the blank