Suppose that a disk drive has 5,000 cylinders, numbered from 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
each of the following disk-scheduling algorithms?

a. FCFS

b. SSTF

c. SCAN

d. LOOK

e. C-SCAN

f. C-LOOK