When light propagates from a material with a given index of refraction into a material with a smaller index of refraction, the speed of the light Part B

What is the minimum value that the index of refraction can have? Part C

Now consider a ray of light that propagates from water $($n$=1\mathrm{.}33$n$=1\mathrm{.}33)$ to air $($n$=1$n$=1).$ If the incident ray strikes the water$-$air interface at an angle $10$$10,$ which of the following relations regarding the angle of refraction, $2$$2,$ is correct?