answer this physics question with working out

A yellow light ray travels symmetrically through a triangular glass prism, as shown. The prism is surrounded by air (n = 1.00). Angle b = 30 and angle a = 60. a b a Calculate the value of the angle c. Show your reasoning. b Calculate the value of the refractive index of the glass prism. c The original ray of yellow light is replaced by a ray of a mixture of yellow and blue light. It strikes the prism at the same angle as before. Draw a labelled sketch to show the effect on the new light ray