Please include full solution, formulas, and right answer and please do this asap thanks in advance (t=1.25 landa)

itre b) to the 3rd maximum from the centre? [A4] 7. For green light, A = 540 nm, determine the type of interference (constructive or destructive) on the reflected side for both a) and b). Start with a crest. Show the rays. Write your answer on the reflected and transmitted sides. Also, determine the thickness of the middle layer in nm. [A6] a ) b ) n = 1 n = 1 n = 1.4 t= 1A n = 1.5 t = 1.251 n = 1.3 n = 1.65