4. Compare the average queueing delay (waiting and service) of an M/G/1 queue with following queueing disciplines: (arrival rate=0.5, average service time=1) (30%) (a) FCFS; (b) Non-preemptive LCFS; (c) Preemptive with resume LCFS under the following service distribution: (1)Constant; (b(x)=1) (2) Exponential; (expo(1)) (3) Hyper-exponential with two parallel servers (probability of choosing each server is 1/3, 2/3, and service rate is 0.5, 2, respectively) (You need to calculate the exact delays for each combination and compare them. There are 9 combinations.) 4. Compare the average queueing delay (waiting and service) of an M/G/1 queue with following queueing disciplines: (arrival rate=0.5, average service time=1) (30%) (a) FCFS; (b) Non-preemptive LCFS; (c) Preemptive with resume LCFS under the following service distribution: (1)Constant; (b(x)=1) (2) Exponential; (expo(1)) (3) Hyper-exponential with two parallel servers (probability of choosing each server is 1/3, 2/3, and service rate is 0.5, 2, respectively) (You need to calculate the exact delays for each combination and compare them. There are 9 combinations.)