$4.$ Each inode has a unique number. You can see the inode numbers of the files and directories using the $$ls $$li$$ command. All the information you access with ls command about files and directories reside in the inode, except for the filename $($which is contained in the directory entry$).$ The inode also contains a pointer to the content of the file. A directory is a special kind of file that contains a table which maps filenames to inodes. When you run the ls $$ali$$ command, you will encounter two directories. $($dot$)$ and $..($dot dot$).$ The dot $(.)$ is a mapping to itself, and the dot dot $(..)$ is mapping to the parent directory.

a$.$ What is the inode of the $/$etc directory?

b$.$ What is the inode of the parent of $/$etc directory?