4. Consider two different machines A and B that could be used at a station. Machine A has a mean effective process time of 1.0 hour and an SCV of 0.25 . Machine B has a mean effective process time of 0.85 hour and an SCV of four. a) For an arrival rate of 0.92 job per hour with Ca2=1, which machine will have a shorter average cycle time? b) Now put two machines of type A at the station and double the arrival rate (i.e. double the capacity and throughput). What happens to cycle time? c) Do the same for machine B. Which type of machine produces shorter average cycle time