QUESTION ONE a. Modern Systems often have Disk Controller as opposed the earlier ones. In what way in this useful for the input/output operations? [6 marks] b. Six jobs are waiting to be run. Their expected running times are 10,8,6, 3.1, and X. In what order should they be run to minimize average completion time? State the scheduling algorithm that should be used AND the order in which the jobs should be run. (Your answer will depend on X). [1 marks) Hint. Your X must compare with all the rest of the running times c. You and your team members just came up with a new Operating system. Why/when would you choose to implement Round robin algorithm over First come first serre and vice versa? (4 marks) d. Making an application a multi-threaded basale of advantages over a single heavyweight process. However, there are numerous challenges to be faced by developer. Briefly explain some of these challenges. Is there any way out in marks] c. L. Distinguish between the use of ">",">>", and "",">>", and "