(a) What is the ratio of Ip to the intensity Im at the center of the pattern?

(b) Determine where P is in the two-slit interference pattern by giving the maximum or minimum on which it lies or the maximum and minimum between which it lies.

(c) Next, for the diffraction that occurs, determine where point P is in the diffraction pattern by giving the minimum on which it lies or the two minima between which it lies.