1. Set the access permissions of your .plan and .project file so that only other members of your group can read the file and so that you are not allowed to read your own files nor can others. At this point both you and your partner are members of the group student.

Can you finger yourself and see the .project and .plan files?

Can your partner finger your account and see your .project and .plan files.

2. Change the group membership of the .plan and .project files to your alternate groups using the chgrp command. ie: chgrp whales .plan .project

Can you finger yourself?

Can your partner use finger to see your .project and .plan files? Why or Why not?

3. Is the file command uses the file extension to determine the type of the file?