Suppose that a disk drive has 5,000 cylinders, numbered 0 to 4999. The
drive is currently serving a request at cylinder 143, and the previous
request was at cylinder 125. The queue of pending requests, 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 C-SCAN?