Two antennas located at points a and b are broadcasting radio waves of frequency 107.0 mhz. the signals start in phase with each other. the two antennas are separated by a distance d = 10.1 m. an observer is located at point p on the x axis, a distance x = 93.0 m from antenna a. the points a p and b form a right triangle.

a) what is the phase difference between the waves arriving at p from antennas a and b? enter your answer in radians (rad).

b) now observer p walks along the x axis toward antenna a. what is p's distance from a when they first observe fully constructive interference between the two waves?

c) if observer p continues walking until they reach antenna a, at how many places along the x axis (including the place you found in the previous problem) will they find maxima in the radio signal due to constructive interference?