When standing a certain distance from a jet on the ground on which all three engines are running at equal power, the sound level is heard at the threshold of pain, 120dB. (A) If the pilot shuts down 2 engines however leaves the 3rd at the same power, what is the sound level that is heard? (B) When at a different distance, the same jet is heard initially at 95dB. At that point after two engines are shut off, what sound level is heard?