Suppose the following disk request sequence (track numbers) for a disk with 200 tracks is given: 20, 80, 102, 42, 90, 35, and 197. Assume that the initial position of the R/W head is on track 100. On this given scenario, perform the following tasks.

i. Draw the diagrams for arm movement for the following seek strategies. Calculate the total and average number of tracks travelled. [2x6 =12 Marks]

ii. Analyse the results you obtained and conclude which strategy performed best in given scenario according to the scheduling goal of minimising arm movement. [3 Marks]

a) FCFS b) SSTF c) SCAN d) C-SCAN e) LOOK f) C-LOOK