Consider a disk with a sector size of 512 bytes, 63 sectors per track, 16,383 tracks per surface, 10 double-sided platters (i. e., 20 surfaces). The disk platters rotate at 7,200 rpm (revolutions per minute). The average seek time is 9 msec, whereas the track-to-track seek time is 1 msec (use these numbers in appropriate places in your calculation).