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the train is moving past a crossing where cars are waiting for it to pass. while...

the train is moving past a crossing where cars are waiting for it to pass. while waiting, the driver of the lead car becomes sleepy and rests his head on the steering wheel, unintentionally activating the cars horn. a passenger in the back of the train hears the horns sound at a frequency of 434 Hz and a passenger in the front hears it at 409 Hz. find the trains speed and the horns frequency, assuming the sound travels along the tracks. speed of sound = 343 m/s.
a) the trains speed in m/s
b the horns frequency in Hz
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