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Using the general approximation for the mean cycle time in the system, compute the cycle time estimate for the following systems (a and b) using the two-machine exact adjustment for exponential systems: (a) M/G/2 with the mean number of arrivals per hour being 7 , and the mean service time being 1/4hr. Compute the estimates for service SCV's of (1/2,1,2). (b) G/M/2 with the mean number of arrivals per hour being 7 , and the mean service time being 1/4hr. Compute the estimates for arrival SCV's of (1/3,2,4). (c) Redo Part (a) using the general approximation with the square root formula (that is, for service SCV's of (1/2,1,2))