a) The OS peripheral devices are categorized into 3: Dedicated, Shared, and Virtual. Explain the differences among them and provide an example of devices for each category. I (6 marks) b) The queue has the following requests with cylinder numbers as follows: 98, 183, 37, 122, 14, 124, 65, 67 Assume the head is initially at cylinder 56. Based on the information given above, discuss the following disk scheduling algorithm. You are required to draw a diagram to support your answer. i. First Come First Serve ii. Shortest Seek Time First (SSTF) (5 marks) (5 marks) iii. SCAN algorithm (4 marks) (Total: 20 marks)