Problem-4:Two students standing 54.9 m apart are tossing around footballs designed to whistle while they are airborne.a) When student A throws their football toward student B at 16.0 m/s it emits a frequency of 690 Hz. What frequency isheard by student B? (Answer:724 Hz)b) When student B throws their football toward student A at 15.0 m/s it emits a frequency of 610 Hz. What frequency isheard by student A? (Answer:638 Hz)c) If the two footballs are thrown simultaneously, what is the difference in frequencies detected by student A? (Answer:21Hz)d) If the two footballs are thrown simultaneously, what is the difference in frequencies detected by student B? (Answer:140Hz)

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