Answer:
Sound Intensity at microphone's position is 
The amount of energy impinging on the microphone is 
Solution:
As per the question:
Emitted Sound Power, 
Area of the microphone, 
Distance of microphone from the speaker, d = 52.0 m
Now, the intensity of sound,
at a distance away from the souce of sound follows law of inverse square and is given as:


Now, the amount of sound energy impinging on the microphone is calculated as:
If
be the Incident Energy/
Then
The amount of energy incident per 1.00
is:

I believe its the third answer
B identifying the types of data to be gathered