Problem
Scenario I: Three users need to share files on the system, but no other user can have access to these files. Create user accounts for sophia, olivia, and emmar using default values for account parameters. Create a common group named shared, which will be used to allow these three users to share files with each other. Finally, create a directory named lhomelshared for only these three users to access and to also automatically give group ownership of all new files to the shared group.
Scenario II: Create a directory named ldata in which all users can add files to share with others. This directory should only allow a file to be deleted by the owner of the file (and the root user).