White light is incident on a thin film (n=1.2) which is coating a flat pane of glass (n=1.5). Both red light of 660 nm wavelength and blue light of 440 nm wavelength are strongly reflected. (a) Calculate the minimum thickness of the film. (b) If the pane of glass were replaced with another pane with a higher index of refraction (n=2), would those two colors still experience constructive interference? Why or why not? (c) If the pane of glass were replaced with another one with an index of refraction n=1.1, would the two colors still experience constructive interference? Why or why not?