One nurse in a critical care ward is responFor an infinite-source, single server system with an arrival rate of 15 customers per hour (Poisson) and service time of 2 minutes per customer (exponential), the average number waiting in line to be served is:sible for five patients. Vital sign checks take 7 minutes per patient and once vital signs have been checked they do not need to be retaken for 30 minutes. How long does a patient needing their vital signs to be checked, have to wait