A 2000 Hz siren and a civil defense official are both at rest with respect to the ground. What frequency does the official hear if the wind is blowing at 15 m/s (a) from source to official and (b) from official to source?

Explanation

To solve the problem, we will apply the Doppler effect formula for sound waves, considering the influence of wind on the frequency heard by the observer.

### Given:
- Frequency of the siren (source frequency, \( f_s \)) = 2000 Hz
- Speed of sound in still air (\( V \)) = approximately 343 m/s (at room temperature)
- Speed of wind (\( V_w \)) = 15 m/s

### Part (a): Wind blowing from source to observer
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