The radiation emitted by a laser spreads out in the form of a narrow cone with circular cross section. The angle of the cone

The radiation emitted by a laser spreads out in the form of a narrow cone with circular cross section. The angle θ of the cone is called the full-angle beam divergence. An argon laser, radiating 300 kW at 514.5 nm, is aimed at the moon in a ranging experiment.

A) If the beam has a full angle beam divergence of 0.88 μ rad, what area on the moon's surface does the laser lluminate?

B) What is the intensity of the beam on the moon's surface?