what angle does the light leave the glass

A diver shines a light up to the surface of a
?at glass-bottomed boat at an angle of 33?
relative to the normal.
If the indices of refraction of air, water,
and glass are 1.0, 1.33, and 1.4 respectively,
at what angle does the light leave the glass
(relative to its normal)?
Answer in units of degree