A 568 nm laser emits 1.33 x 1019 photons per second, how much total energy (in J) would this transfer if it was shined directly on an object for 3.46 s?

Please use neat handwriting and show work A light ray traveling in air hits the surface of an unknown liquid ina beaker as shown in the picture. When the angle 0 is 55° the ray hits at a point where x = 2 cm. Calculate the index of refraction of the liquid.

I need help with 15 please.