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\"JP\" M 2. Consider a computer server with jobs arriving at random points in time, queueing for service, and departing from the system aer service completion. Consider the following four families of random variables (stochastic processes). a) N}. number of jobs in the system at the time of departure of the [cm customer. b) Wk 7 Time that the kt\" customer has to wait in the system before service. 0) X(t) Number of jobs in the system at time t. d) Y(t) Cumulative or total service time requirements of all the jobs in the system at time t. Classify these stochastic processes into four types. Justify/explain your classication (to receive lll credit, justication/ explanation must be offered)