A slab of glass with an index of refraction of 1

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A slab of glass with an index of refraction of 1.5 is submerged in water with an index of refraction of 1.33. Light in the water is incident on the glass. (Note: the glass is the first medium and the water is the second medium that the light is going through). Find the angle of refraction if the angle of incidence is at

1. 60 degrees
2. 45 degrees
3. 30 degrees