a. Differentiate between FAT16 and FAT32. b. Based on the directory given below answer the following question. FILE NAME AA BB CC DD START 0 6 12 16 Directory LENGTH 3 4 2 2 i. Give the name of the file allocation method. ii. Show the allocation of the file based on the information given in the directory above. (Draw a disk to show the allocation of the file in a disk block. The address of the disk block start at 0.