Two identical speakers emit sound waves of frequency 680 Hz uniformly in all directions. The total audio output of each speaker is 1 mW. A point P is 2.00 m from one speaker and 3.00 m from the other.

(a) Find the intensities I1 and I2 from each speaker separately at point P.

(b) If the speakers are driven coherently and are in phase, what is the intensity at point P?

(c) If they are driven coherently but are 180o out of phase, what is the intensity at point P?

(d) If the speakers are incoherent, what is the intensity at point P?