please answer a and b

S. (2 pts) We have a Q system with two servers. The inter-arrival time of customers follows a uniform distribution U(5, 15). The service time of each server follows a Triangle distribution, T(10, 15, 20). The time unit is minute. To answer the following questions, use the approximation Q formula explained in the class. a. Determine the average waiting time of customers. b. Determine the average system size of the Q-system. (Hint: first find the average size from Wq obtained above. Then add the average number of customers under service. Add these together.)