[Based on E. Etkina] The height of the Sun above the horizon is 21.0. You sit on a raft and want to orient a mirror so that sunlight reflects off the mirror and travels at an angle of 45 in the water of refractive index 1.33. How should you orient the mirror? Provide your answer as the angle that the reflective side of the mirror makes with the horizontal direction that you used as a reference for the sunlight