Solve for a and b . Just need answer

(8%) Problem 5: You can determine the index of refraction of a substance by measuring its critical angle for total internal reflection. Randomized Variables c, W = 68.50 Crutison, Aaron - aaron crutison@doane.edu @theexpertta.com - tracking id: 9N69-36-32-49-9BF0-41106. In accordance with Expert TA's Terms of Service. copying this information to any solutions sharing website is strictly forbidden so may result in termination of your Expert TA Account. 50% Part (a) What is the index of refraction of a substance that has a critical angle of 68.50 when submerged in water (with index of refraction 1.333)? 50% Part (b) What would the critical angle be for this substance in air