a. What is queue theory. b. Discuss the differences between oversaturated and undersaturated queues. c. On a given day, 525 veh/h arrive at a tollbooth located at the end of an off-ramp of a rural expressway. If the vehicles can be serviced by only a single channel at the service rate of 605veh/h determine i. The percentage of time the operator of the tollbooth will be free ii. The average number of vehicles in the system iii. The average waiting time for the vehicles that wait