Suppose that a disk has 5000 cylinders, number 0 to 4999. The drive is currently serving a request at cylinder 143, and the previous request was at cylinder 520. The queue of pending request, in FIFO order is: 86,1470,913,1774,948,1509,1022,1750,130 Starting from the current head position, what is the total distance in cylinders that the disk arm moves to satisfy all the pending requests, for each of the following disk scheduling algorithms? What is the average seek time on each case? LOOK and SCAN