Another hospital, that was located near Al Ain Hospital, was recently closed, and therefore more patients started arriving at the emergency department of Al Ain Hospital. Now, on average, each 20 minutes a patient arrives at the emergency department who needs to be checked by the medical doctor urgently. The arrival process is still following the Poisson distribution. The amount of time that the medical doctor spends with the patients remains the same. It is still random, and on average, 15 minutes is spent with a patient. After closing the neighbor hospital, the management of Al Ain Hospital noticed that the waiting time at its emergency department is reaching an unacceptably high value. Therefore, the management is thinking of hiring more medical doctors to decrease the waiting times of the patients. f. What are the two approaches based on which Al Ain Hospital can decide about the extra number of medical doctors that it should hire? Please give a clear and to-the-point description of the two approaches. Please do also discuss which of the two approaches you would prefer with a justification. Approach 1: Approach 2: Your preference: