The sun emits energy at the rate of about 39 x 1026 w

Question

Problem: The Sun emits energy at the rate of about 3.9 x 10²⁶ W.

Part I: Using astronomical data, estimate the fraction of this energy that falls on Earth.

Part II: With the Sun directly overhead, what's the rate at which energy strikes each square meter of Earth's surface?

Part III: Discuss the implications of your answer in part (B) for solar energy use.

I need help to solve the above problem and neglect reflection and absorption by the atmosphere.