1. You can easily make a friend an admin to one of your groups. Go to your home page.
2. Click on the name of your group
2. Click on the name of your group at the top of the page.
3. You will now see conversation group information. Scroll down and you can see the list of participants.
4. Just click on the name of the person you want to make admin.
5. Then click Promote to Moderator.
5. You're done! You can also remove this by following the same procedure. However this time it will state Remove Moderator.