In these examples, demonstrate that it is a queueing system by describing its components. Exercise 2. (20 marks) TE Consider a pediatrician who schedules patients every quarter of an hour and who spends t minutes with every kidic, where: ( 16 minutes with probability of 75% (13 minutes with probability of 25% A) Calculate the mean and the variance (10 marks) B) Determine the service utilization factor? What you can say about the system? (10 marks)