Venus is an inner planet which orbits the Sun in almost the same plane as the Earth. Its average radius of orbit is 0.72 AU. Viewed from the Earth’s equator, estimate maximum number of hours before sunrise for which Venus can be observed in the night sky?

1 AU is the average distance from the Earth to the Sun.

The question also wants you to draw a diagram. I had trouble coming up with a diagram that would give me any lead in to solving the problem. Thanks!