How to close a Yahoo Group?

I am the only moderator of a small group, 30 members. Out of that only 2 other members regularly respond. We haven't had messages for a year with one exception when I sent out a message asking if anyone was around. The group owner is gone. As moderator she only gave me limited moderator abilities, so I don't have the ability to close the group. I can't leave as that has also been removed as an ability - which I think is weird, there you have it though. Its a dead group. Question - how can I have it shut down OR how can I promote it, so that it is active again. Any help is appreciated.