Question: two speakers a and b are at the same point...

Two speakers, A and B, are at the same point on an x-axis and each emits sound with a wavelength of 0.25 m. Speaker B's phase constant is 260 degrees larger than speaker A's phase constant and each produces an amplitude of 10 Pa. What amplitude occurs along the x-axis in front of these speakers (Pa)? b. What is the minimum distance you can move speaker A to achieve constructive interference along the x-axis? Give a positive answer regardless of direction.