7. A tornado siren has a sound intensity level of 88 dB at a distance of 500 m. A. What is the sound intensity at this distance, in W/m? B. A human eardrum has an approximate area of 0.5 cm = 5.0 10-5 m. For a listener located 400 m from the siren, how much energy will be absorbed by their eardrum per second? C. At what distance from the siren would the sound intensity be painful (130 dB)? D. What is the power output of the siren, in watts?