Fig. 1 shows a FAT file system. Answer the following questions. a. How many files on disk? b. Which physical block do they start? c. What are physical blocks for these files? d. If physical block size is 4KB, what are their sizes? Fig. 2 shows the sectors on a disk. If the physical block size is 2KB, how many physical blocks on this disk? _____ How many physical blocks do the following files File A: 2000 bytes _____ File B: 2050 bytes _____ File C: 8200 bytes _____ File D: 4100 bytes _____