Suppose there is a disk with 100 cylinders numbered 0 to 99. The current position of the head is at 15 and is moving upwards. The following I/O request arrived: 5, 0, 25, 15, 2, 85, 12 and 60. Calculate the number of disk arm / head movements that are required if the disk arm scheduling algorithm used is: i. SSTF (Shortest Seek Time first) ii. FIFO