b) At a certain terminal, the arrival distribution of trucks is found to be Poisson with 3 trucks arriving per hour. The service time is exponentially distributed with unloading rate of 4 trucks per hour. Determine i. Expected number of trucks in the queueing system [ ii. Expected waiting time of the truck in the queue. [3 marks] be iii. Probability that the loading and unloading dock and workers will idle. iv. The possible reduction in waiting time if loading and unloading standardized is