Two small stereo speakers A and $B$ that are $1\mathrm{.}40$ m apart are sending out sound of wavelength $34\mathrm{.}9$ cm in all directions and all in phase. A person at point $P$ starts out equidistant from both speakers and walks $($Eigure $1)$ so that he is always $1\mathrm{.}50$ m from speaker $B.$ Limit your solutions to the cases where $x1\mathrm{.}50m.$