Confused words - who / whose

who's / whose

1. not here today?
2. book is this?
3. broken the window?
4. taken my pen?
5. bag has been stolen?
6. in the office?
7. dad is Irish?
8. She's the woman  going to be our new manager.
9. Ask Walter, he knows  who.
10. Do you know  van that is?