7. The outstanding disk requests are for tracks 6, 10, 4, 20, 36, 8, and 40, in that order. Assume that the seek time speed is 5 msectrack, there are 50 cylinders total, and presently the read-write head is at track 15 and moving up (towards 50). Calculate the seek time for each of the following scheduling methods: ?? a) FCFS b) SSTF c) C-LOOK