012 1 10.0 points A rock group is playing in a bar. Sound emerging from the door spreads uniformly in all directions. The intensity level of the music in 88.4 dB at a distance of 6.73 m from the door. At what distance is the music just barely audible to a person with a normal threshold of hearing? Disregard absorption. Answer in units of m.013 10.0 points The sound level produced by one singer is 83.1 dB. What would be the sound level produced by a chorus of 28 such singers (all singing at the same intensity at approximately the same distance as the original singer)? Answer in units of dB