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Question 3: We have seen that magnetic hard disks are still widelly used due to its much lower cost per bit ratio when compared to solid state disks. Consequently, Arm Scheduling Algorithms play an important role towards performance depending on the type of applications and their particular data access behaviour. (i) Describe in detail the data access mechanism in magnetic hard disks. (i) What does Access Time involve? Which operation affects the most Access Time? Explain. (iii) Explain FCFS in detail. What are its advantages and disadvantages? (iv) Explain LIFO in detail. What are its advantages and disadvantages? (v) Explain SSTF in detail. What are its advantages and disadvantages? (vi) Explain SCAN in detail. What are its advantages and disadvantages? (vi) Explain CSCAN in detail. What are its advantages and disadvantages