Match the process by the fundamental interaction responsible for this process.
An apple is held off the ground by the surface of a table:
1. The weak interaction.
2. The normal interaction.
3. The strong interaction.
4. The air resistance/friction.
5. The gravitational interaction.
6. The electromagnetic interaction.
6. How many more minutes would it take light from the sun to reach Earth if the space among them were filled with water rather than a vacuum? The sun is 1.5 x 108 km from Earth.