Suppose that a $10-MB$ file is stored on a disk on the same track $($track $50)$ in consecutive sectors$.$ The disk arm is currently situated over track number $100.$ How long will it take to retrieve this file from the disk? Assume that it takes about $1ms$ to move the arm from one cylinder to the next and about $5ms$ for the sector where the beginning of the file is stored to rotate under the head. Also, assume that reading occurs at a rate of $200M\frac{B}{s}.$