[GET ANSWER] Suppose that the head of a moving-head disk with 100 tracks, numbered 0 to 99, is currentlyserving a request at track 40 and moving upwards. The queue of requests is kept in a FIFO queuas the following.80, 30, 55, 20, 10, 90Calculate the total number of head movements (in terms of tracks traversed) needed to satisfythese requests for the following disk-scheduling algorithms. Illustrate the head movement eithergraphically or other means.[(i)FCFS scheduling(ii)SCAN scheduling(iii)SSTF

Preemptive vs. Non-Preemptive Process Scheduling