there are $8$ file requests in the system $.$ there track num and data size are listed below there are some duplicated requests if the file names are same they are same files. the hard disk drive spins at $7200$ rpm$.$ the data Transfer rate of main memory is $2000$MB$/$s$.$ and data transfer rate of disk is $100$MB$/$s$.$ It takes $0\mathrm{.}1$ ms to transverse $1$ track. for example it takes $1$msto move from track $50$ to track $60.$ if the last visited track is $50$ and direction of arm is increasing $1.$ Use SCAN algorithm to schedule the I$/$O requests $2.$ Assume the system without cache. Calculate the total data access time ignoring the overhead and considering the memory hierarchy