Choose the correct options

1. It's
   [your|yours]
   book.
2. Is it
   [my|mine]
   pen?
3. Can I borrow your laptop?
   [My|Mine]
   is not working.
4. [Your|Yours]
   house is bigger than
   [her|hers].
5. [Our|Ours]
   teacher doesn't like when I'm late.