помогите пожалуйста номер 4 пожалуйста заблаговременно спасибо

1. Is this your bag? Is this yours?
2. No, but that's my camera. That's mine.
3. There're our shoes. There're ours.
4. That's her mobile. That's hers.
5. We can't find his ticket. We can't find his.
6. Have you got their laptop? Have you got theirs?