Needs some Help with this command for Linux Operations Systems

1.Create a new group called Students in the reserved range of GIDs. What command did you use to create this group?

2.What command would you use to obtain information about this new group?

What was the GID of this group?

3.What command would you use to add the Student group as a secondary group for the student1 user?

What command can you use to verify that student1 was added to the Student group?

4.What command would you use to determine the last time that the student1 user logged into the system?

5.What command would you use to delete the student1 user but not their home directory?