A criminal is involved in a high speed chase, fleeing the police traveling at a constant speed of 40 m/s. The police pursue the criminal at a constant speed of 50 m/s, and are initially 110 m behind the criminal. The police siren has a frequency of 300 Hz, and radiates 250 W of sound energy uniformly in all directions.

Part (a) If the police siren is on, then what frequency does the criminal hear?

Part (b) After 10 s have passed, how far apart are the police and the criminal?

Part (c) After 10 s have passed, at what intensity does the criminal hear the siren? Report your answer in decibels.