(15 pts) In the double-slit arrangement shown below, of = 0.150 mm, L = 140 cm, A = 643 nm, and y = 1.80 cm. a. What is the path difference 5 for the rays from the two slits arriving at P? b. Express this path difference in terms of 7L. c. Does P correspond to a maximum, a minimum, or an intermediate condition? Prove your answer. Viewing screen .,.._-'_.....-.___