Disk scheduling is done by operating systems to schedule I/O request arriving for the disk. If the order disk requests come into the disk driver is 10, 22, 20, 2, 40, 6 and 38 in the order. Assume the disk has 100 tracks. A seek takes 6 millisecond per track moved. Compute the average seek time for C-SCAN, FCFS and SCAN if the disk head is initially at track 20 and with the direction of increasing track