Why is FCFS scheduling an acceptable solution for disk scheduling in a single-user environment? Explain your answer In SSTF scheduling, the algorithm tends to favor middle cylinders over the innermost and outermost cylinders. Why is this the case? Suppose that a disk drive has 5, 000 cylinders, numbered 0 to 4999. The drive is currently serving a request at cylinder 2150, and the previous request was at cylinder 1805. The queue of pending requests, in FIFO order, is: 2063, 1215, 2290, 2808, 547, 1613, 351, 1528, 4960, and 3687. Starting from the current head position, give the order of service requests and the total distance (in cylinders) that the disk arm moves to satisfy all the pending requests for each of the following disk-scheduling algorithms? a. FCFS b. SSTF c. SCAN d. LOOK e. C-SCAN f. C-LOOK