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Hello students, so let us calculate the fcfs scheduling, its total head point, fcfs scheduling, the fcfs here stands for the first come first serve, so its total head movement, head movement as from the starting with the 40, 40 to 80 then plus 80 to 30, then from 30 it travels to 55, then from 55 it travels to 20 plus again the next is as from 20 it travels to 10 with the 10 to 90, so now the difference between this 40 to 80 it travels is 40 plus 30 plus 50 plus 50 plus 25 plus 35 plus 10 plus 80, so the total head movement for the fcfs schedule is 240, so the next second is as the scan scheduling, the scan scheduling where the head moves in a one direction servicing request until it reaches the end and then reserves its direction, assuming that head starts from the track of the 40, so the total head movement, from starting from 40 to 90, so next from 90 plus 90 from 90 to 10, then again plus 10, so here the difference between 40 to 90 is 50 plus 90 from 90 to 10 it is 10, it is 80 and the last we are going to add is 10, so our total head, total head movement for the scan scheduling is the 230, so similarly the third is as the sstf scheduling, where sstf scheduling it stands for the shortest seek time first, so the total head movement for this will be calculated as from 40 to 30, from 30 to 20, from 20 to 55, from 55 to 80, the next is from 80 to 90, the next comes as from 90 to 10, so as the total head movement for this will be 170, it will be the 170, the next part of the question is, the next part of the question is of the failure, failure transferency, transparency when it refers to the ability of disturbed system…