A processor is multiplexed at infinite speed among all processes present in a ready queue with no overhead. (This is an idealized model of round-robin scheduling among ready processes using time slices that are very small compared to the mean service time.) Show that for Poisson input from an infinite source with exponential service times, the mean response time Rx of a process with service time x is given by Rx = x/(1 ). (Hint: Review the basic queueing equations in Appendix H or Chapter 20. Then consider the number of items waiting, w, in the system upon arrival of the given process.)