Here are the answers to the questions:
1. Whose camera is it? It's Tom's camera.
2. Whose flowers are they? They're Elisha's flowers.
3. Whose ball is it? It's Ben's ball.
4. Whose cars are they? They're Youssef's cars.
5. Whose ice cream is it? It's Jenny's ice cream.
6. Whose books are they? They're Isabel's books.