Identify the artworks labeled 1, 2, 3, 4, 5, and 6.

1. The Birth of Venus by Sandro Botticelli.

2. The Creation of Adam by Michelangelo.

3. Mona Lisa by Leonardo da Vinci.

4. Primavera by Sandro Botticelli.

5. The Last Supper by Leonardo da Vinci.

6. Sistine Madonna by Raphael.