6. Consider a system with 13 dedicated devices of the same type. All jobs cur- rently running on this system require a maximum of three devices to com- plete their execution, but they each run for long periods of time with just two devices, and request the remaining one only at the very end of the run. Assume that the job stream is endless and that your operating system's device allocation policy is a very conservative one: no job will be started unless all the required drives have been allocated to it for the entire dura- tion of its run. a. What is the maximum number of jobs that can be in progress at once? Explain your answer. What are the minimum and maximum number of devices that may be idle as a result of this policy? Under what eircumstances would an additional job be started? b