An ophthalmologic clinic has patients arriving at the clinic in a certain pattern. Based on a one-month observation, the following data (see Table 10I) is obtained with respect to arrival: (a)...

An ophthalmologic clinic has patients arriving at the clinic in a certain pattern. Based on a one-month observation, the following data (see Table 10I) is obtained with respect to arrival:

(a) Simulate the system for 20 arrivals. When did the last patient arrive if the clinic opened at 8.00 a.m.?

(b) Simulate the system for 3 hours. How many patients have arrived so far?

(c) Compute the average waiting time of the patients under the following conditions:

• Each arrival spends approximately 9 minutes for service.

• The service time is distributed in the following fashion: 20 per cent spend 13 minutes, 45 per cent spend 10 minutes, and the rest spend 6 minutes. When will the clinic complete the servicing of the last arrival if the doors are closed after three hours?