A horizontal light ray is incident on a plate glass prism, where ? = 28.5°. Calculate the angle of deviation ? of the ray --- the angle that the ray emerging from the prism makes with the incident ray. (in deg) A: 1.58×101 B: 2.10×101 C: 2.80×101 D: 3.72×101 E: 4.95×101 PLEASE SHOW ALL WORK