Snell's Law: in the Figure, a Laser Positioned on a Ship

Multiple Choice

Snell's law: In the figure, a laser positioned on a ship is used to communicate with a small two-man research submarine resting on the bottom of a lake. The laser is positioned 12 m above the surface of the water, and it strikes the water 20 m from the side of the ship. The water is 76 m deep and has an index of refraction of 1.33. How far horizontally is the submarine from the side of the ship?

A) 84.1 m
B) 64.1 m
C) 104 m
D) 74.1 m
E) 94.1 m