a. Using the specifications in Table 1, calculate the average access time for the disk drive to transfer 500 MB of data using sequential and random access. Explain the difference in access time. Feature Specification Capacity 1 TB Average seek time 15 ms Spindle speed 5400 rpm Bytes per sector 250 No. of sector per track 200 Table 1: Disk drive specifications b. Aishah asked for your advice regarding the potential use of RAID system in her computer with the aim of attaining good performance with data recovery feature. Propose a suitable RAID scheme (including its diagram) together with proper justifications and explain the issues relevant to that design.