The Kishwaukee Hospital emergency room (ER) is currently organized so that all patients register through an initial check-in process. At his or her turn, each patient is seen by a doctor and then exits the process, either with a prescription or with admission to the hospital. Currently, 55 people per hour arrive at the ER, 10% of who are admitted to the hospital and the other 90% get a prescription. On average, 7 people are waiting to be registered (Buffer 1) and 34 are registered and waiting to see a doctor (Buffer 2). The registration process takes, on average, 2 minutes per patient. Among patients who receive prescriptions, average time spent with a doctor is 5 minutes. Among those admitted to hospital, average time spent is 30 minutes. Assume the process to be stable; that is, average inflow rate equals average outflow rate. A. On average, how long does a patient spend in the ER? B. On average, how many patients are being examined by doctors? C. On average, how many patients are there in the ER