1B. Suppose that a disk drive has 200 cylinders, numbered from 0 to 199. The drive is currently serving a request at cylinder 60 and the queue of pending requests is: 86, 159, 39, 139, 35, 71, 65, and 14. Starting from current head position, what is the total distance (in cylinders) that the disk arm moves to satisfy all pending requests for each of the following disk-scheduling algorithms? Show clearly all the steps. i. FCFS ii. SSTF iii. LOOK