Please answer this and show your solutionson paper.I will give you a very good feedback. on paper please :(

ON PAPER PLEASE ! ON PAPER !

4. A beam of light moves from air to substance X with an initial wavelength of 452 nm. Calculate the wavelength in nm as it enters substance X with a refraction velocity of 2.111 x 108 m/s. 5. The ratio of the two refractive index from first to second medium is 1/5. Calculate the angle of refraction if the angle of incidence is 58 degrees. 6. A light moves from air to a certain medium. The angle of incidence is 75 degrees while the angle of refraction is 45.40 degrees. a. identify the type of medium/material where the light refracts and b. calculate its speed at this medium in m/s. Show your FBD as light passes through the medium