I take issue with your answer to the Asia and Oceania question. Surely PNG is purely Oceanian? The correct answer is Indonesia which, having territory on New Guinea (Oceania) as well as Asia, straddles the two continents.
Well, it is up for debate. Some folks definitely think that Papua New Guinea is part of Asia, and I've heard it. I know that Jetpunk says otherwise, and I concur, but it's quite hard to change people's opinions on a matter. Considering Indonesia is generally considered Asian, and PNG shares land with Indonesia, you definitely can call it Asian. So I will not change it, unless someone provides a convincing argument.
Yes it could, and it could be Brunei also, but if you can't guess Malaysia then too bad. You should get it eventually. Being too specific will make it too easy