Identical sound waves of frequency f are emitted from speakers at points A and B (Fig. P...

Identical sound waves of frequency f are emitted from speakers at points A and B (Fig. P12.41), which are a distance 8.5 m apart. Listeners are located at points X, Y, and Z, which are equally spaced on the line between A and B. One listener finds constructive interference of the sound waves, and the other two find destructive interference. (a) Which listener experiences constructive interference? (b) What is the lowest possible frequency at which the destructive interference in part (a) can occur? The speed of sound in air is 343 m/s.