A loudspeaker at the front of a room and an identialloudspeaker at the rear of the room are being driven by the sameoscillator at 456Hz. A student walks at a uniform rate of 1.50m/salong the length of the room. She hears a single tone repeatedlybecoming louder and softer. (a) Model these variations as beatsbetween the Doppler shifted sounds the student receives. Calculuatethe number of beats the student hears each second. (b) Model thetwo speakers as producing a standing wave in the room and thestudent as walking between antinodes. Calculate the number ofintensity maxima the student hears each second.