Two speakers, which are in phase with one another, broadcast identical sound waves at a frequency of
170 Hz. Assume the speed of sound to be 340 m/s. The speakers are pointed at one another.

Part A- Speaker A is positioned at x = 0 m, and speaker B is located at × = +14.40 m. In between the speakers, there are a few locations at which the two waves produce completely destructive interference. What is the x-coordinate of the point closest to speaker B at which completely destructive interference occurs?
x = _____ m

Part B- In between the speakers, there are also a few locations at which the two waves produce completely constructive interference. How many locations are there, along the line between the speakers, at which completely constructive interference occurs?
______ Locations