Flashlight Parts At What Angle Is The Flashlight Being Held Under Transparent Liquid?

At what angle is the flashlight being held under transparent liquid? - flashlight parts

Part 1:
Noting: (The index of refraction of transparent liquid like water) but with a different refractive index is 1.21. A flashlight held under the stands in a clear liquid in the transparent liquid
Pool. This beam exits the surface of the clear liquid at an angle of theta = 35degrees from the vertical. What angle theta W (in terms of opinion --
vertical) is the flashlight under the clear liquid instead? Answer in units of degrees.

Part 2:
The lantern was slowly from the vertical direction.
The angle at which the beam is not visible on the surface of the pool? Answer in units of degrees.