-----
/ \ 60
/ \
/ \
/ \
/ \
90 / \
| / \
| / \
------- 0 n = 1.0 / n = 1.4 \ n = 1.5
| / \
| / \
-90 / \
/ \
/ \
/ \
/ 60 \
-----
Light is incident from the left at -15 degrees relative to the horizontal.
What is the angle of the exiting light relative to the horizontal?
Give your answer in degrees to two decimal places.