You are at a concert with a friend. When standing at a distance of 10 meters from the stage, the acoustic pressure reaches a maximum value of 8.0 N / m^2?. a Compute the intensity of sound waves 10 meters from the stage, where you are sitting. b) Your friend got a there late and found a spot 25 meters from the stage. Compute the sound level he hears, knowing that the air absorbs sound energy as described by the rate 7.00 dB/km. You may need Pair = 1.20 kg / m3, Io = 1.00 10-12W / m? and consider a speed for sound waves of 343 m/s.