Q1. Assume that the outermost track of a disk is numbered 0 and the innermost track is numbered 600. Assume that the disk head has just read a sector on track 40 and that the disk I/O queue contains the following track request: 50, 75, 20, 150 85, 300.

a) In what sequence will these requests be serviced if C-Scan disk scheduling is used. Also calculate the total distance in tracks traveled by the disk head in satisfying these requests.

b) In what sequence will these requests be serviced if Look disk scheduling is used. Assume that the head is traveling in the direction of the outermost track. Also calculate the total distance in tracks traveled by the disk head in satisfying these requests.

c) In what sequence will these requests be serviced if S-S-T-F disk scheduling is used. Also calculate the total distance in tracks traveled by the disk head in satisfying these requests.