Question: You bike at 11.1 m/s directly away from your neighbor\'s trumpet sound and toward the sound of another neighbor\'s trombone and find that you hear both instruments at exactly the same pitch. The trumpeter is practicing her middle C, at a frequency of 262 Hz.
Part I: What frequency is the trombonist producing?
I need help to solve the above question and the speed of sound in air is 341 m/s.