$On$ a disk with $1000$ cylinders numbers $0to999,it$ takes $1msto$ travel from one track $to$ the next adjacent one. While retrieving data from track $150,$ the following list $of$ requests has arrived: $-$

Track Number: $210,190,5,101,305,70,14.$

$By$ using following device handler seek strategies:

$(i)FCFS\frac{\text{F}\text{i}\text{r}\text{s}\text{t}\text{C}\text{o}\text{m}\text{e}\text{F}\text{i}\text{r}\text{s}\text{t}\text{S}\text{e}\text{r}\text{v}\text{e}}{F}$IFO $(Firstin$ First Out$)$

$(ii)SSTF(Shortest$ Service Time Request$)$

$(iii)$ SCAN

$(iv)LOOK$

Compute the number $of$ tracks and the average number $of$ tracks the disk arm must move $to$ satisfy the requests $in$ the disk queue. Show your work for each strategy.