Let's consider the interference between two sinusoidal sound waves. Two small loudspeakers A and B $($see fig$)$ are driven by the same amplifier, and each emits a pur sinusoidal wave. The two waves are emitted simultaneously and are initially instep with each other. If the speed of sound is $350$ m$/$s$,$ for what frequencies does maximum constructive interference occur at point P$?$ For what frequencies does destructive interference $($cancellation$)$ occur at point P$?2\mathrm{.}00$