a disk drive has 2,000 cylinders, numbered 0 to 1999. 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 each of the following disk-

scheduling algorithms?

a. FCFS

b. SSTF

c. SCAN

d. LOOK

e. C-SCAN

f. C-LOOK