Disk scheduling algorithm

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Suppose that a disk drive has 5,000 cylinders, numbered 0 to4999. The drive is currently serving a request at cylinder143, and the previous request was at cylinder 125. The queueof pending requests, in FIFO order, is:
   86, 1470, 913, 1774, 948, 1509, 1022, 1750,130
Starting from the current head position, what is the totaldistance ( in cylinders) that the disk arm moves to satisfy all thepending requests for each of the following disk-schedulingalgorithms? FCFS, SSTF, SCAN, LOOK, C-SCAN, C-LOOK

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