Assume combined indexed allocation scheme is used in a file system (like in Unix/Linux). For each file, we have an inode. In the inode, we can keep 10 direct block addresses at most. Block size is 1 KB. Disk address (pointer) size if 4 bytes long. What can be the maximum file size? How many index blocks (of all kind, like first level, second level, third level index blocks), we need for files A, B, C, of sizes 3 KB, 200 KB, 32 MB and 1 GB.