the siren on an ambulance is emitting a sound whose frequency is2550 hz. the speed of sound is 343 m/s.(a) if the ambulance is stationary and you (the"observer") are sitting in a parked car, what are the wavelengthand the frequency of the sound you hear? (b)suppose that the ambulance is moving toward you at a speed of26.3 m/s. determine the wavelength and the frequencyof the sound you hear. (c) if the ambulance ismoving toward you at a speed of 26.3 m/s and you aremoving toward it at a speed of 12.0 m/s, find thewavelength and frequency of the sound you hear.