019 (part 1 of 2) 10.0 points An ambulance is traveling south at 50.2 m/s, away from a car that is traveling north at 30.3 m/s. The ambulance driver hears his siren at a frequency of 789 Hz. -50.2 m/s- Ambulance 30.3 m/s- What wavelength does a person who is standing between the car and the ambulance detect from the sound of the ambulance's siren? The velocity of sound in air is 343 m/s. Answer in units of m. 020 (part 2 of 2) 10.0 points At what frequency does the driver of the car hear the ambulance's siren? Answer in units of Hz.