who's vs whose

The teacher asked whose book was left on the desk.

I wonder whose idea it was to organize the event.

She met a man whose smile could light up a room.

Do you know whose car is parked outside?

He is the author whose work inspired many.

They are friends with a family whose traditions are fascinating.

I can't remember whose turn it is to do the dishes.

The artist whose painting won the award is very talented.

She is the one whose opinion matters the most to me.

We need to find out whose responsibility it is to clean up.