A Collimated Laser Beam Moves Downward an Angle 20 $\circ$ with Respect to Horizontal and Strikes the Left Side

A collimated laser beam moves downward an angle 20.0 ^$\circ$ with respect to horizontal and strikes the left side of a ZnSe block.The block has an index of refraction of 2.44 and is surrounded by air with an index of 1.00.The left side of the glass block is vertical (90.0 ^$\circ$ from horizontal) while the right side of the block slopes upward at an angle of 75.0 ^$\circ$ from horizontal,i.e.,the block is thicker at the top than at the bottom.Determine the angle with respect to horizontal at which the light travels after it exits the right surface of the block.

A) 2.2 ^$\circ$
B) 0 ^$\circ$
C) 17 ^$\circ$
D) 8.1 ^$\circ$
E) 15 ^$\circ$