An electronic point source emits sound isotropically at a frequency of 2 × 10^3 hz and a power of 27 watts. a small microphone has an area of 0.77 cm^2 and is located 3.5 meters from the point source. 1) what is the sound intensity at the microphone ? 2) what is the power intercepted by the microphone? 3) how many minutes will it take for the microphone to receive 0.2 joules from the sound waves? 4) what is the sound intensity level at the microphone from this point source? 5) what would be the sound intensity level at the microphone if the point source doubled its power output?