How do you make somone an admin of a group on facebook?

[Brendan]

every other answer is out dated, i cant find anything that can help, everything says "edit group options" or "edit group profile" but the closest thing is "edit group settings" and there's nothing in there about it.
i figured out the problem, everyone is saying "click members list"
but it doesn't say that, it only says members (number) and its not blue, but its a link... i figured it out but thanks guys for trying

[Jake]

If you are admin then you can make others as admin.
Go to groups>> click on the members list >> under the names of each members there is a gear button>> click on the member which you want to make as admin and select Make admin

[Sajal]

At first log in Facebook, Then go to the groups- click here, Then Facebook show you to add friends, Then what friends you want to add you choose them.