A man is traveling on a bicycle at 14 m/s along a straight road that runs parallel to several railroad tracks. He hears the whistle of a train that is behind him. The frequency emitted with the train is840 Hz, but the frequency the man hears is 778 Hz. Take the velocity of sound to be 340 m/s.
1) What frequency is heard by a stationary observer located among the train and the bicycle?
2) What is the speed of the train, and is the train traveling away from or toward the bicycle?