Pleasse solve

Question 4 2 pts At a T-intersection, vehicles headed northbound on Minor Street must turn left into the major street. In the design hour, a total of 200 vehicles wish to undertake that manoeuvre. Those vehicles must give way to a total of 1000 vehicles/hour headed westbound on the major street. Assume that T = 6 sec, To = 3 sec and Cp = 0.9 C. What is the average queue length (including the vehicle being 'served') for the major street approach? What would be the maximum queue length in 90% of the time