Cattail comes out of the water at an angle of 90 ° to its surface, and the sunbeam makes an angle of 50 °

Cattail comes out of the water at an angle of 90 ° to its surface, and the sunbeam makes an angle of 50 ° with the water surface. a) In the figure, mark the angle of incidence of the beam, denoting it as a. Draw the path of the ray reflected from the surface of the water, and mark the angle of reflection of the ray, denoting it β b) Calculate: the angle of incidence of the ray, the angle of reflection of the ray, the angle between the incident and reflected rays.

a) drawing
b) the angle of incidence of the beam is 50 °,
beam reflection angle 50 °,
angle between incident and reflected rays 80 °