Ap A pharmacy dispensing medicines is staffed by one pharmacist open hours a day. On average It takes seconds to serve a customer, and a customer arrives every minutes. Considering Poisson arrivals and exponential service rates, A how long does it take a customer to get a medicine? B How many hours is the pharmacist idle? C If the system were automated, with a service rate of seconds, how long would it take to get a medicine, and would it be better?