can someone help please

White light with a wavelength range of 350 7 700 nm is incident from air (71 : 1.00 onto a thin film. The film has air on one side and a material of a higher refractive index on the other, as per the image below. White light Air nm-r = 1.00 Thln lm anm Unknown material n > \"film Figure. Thin film is between air and a material with a higher refractive index than the thin film. Part 1) What is the refractive index of the thin film if the minimum thickness is 130 um and there is constructive interference in the wavelength range given? Part2) What is the wavelength of 519 nm light (i.e., this is the wavelength ofthe light in air) in the film? Part 3) ifthe film was now suspended in air, as shown below, what would be the minimum thickness of the film needed for constructive interference for the wavelength range given above? White light Air nair = 1.00 Thln lm nfum Air air- : 1.00 Figure. The thin film from earlier parts is now suspended in air