1)You go to the Festival, and there are 50,000 people in the crowd. You sense that the beautiful voice of the lead singer is delayed, arriving to you 1.25 s after she moves her lips and utters the sound on stage. The air temperature today is relatively cool, only 33C. What is the distance between you and the speaker (ignore the transmission time of sound through the cables and the electrical system)? Show all equations used in your calculations and provide units.

2)The time delay of the lead singer's voice is annoying, so you move to the front of the crowd. Now, you experience only a 0.125 s delay and her voice is louder. What is the increase, in dB, in after moving to the front? Show all equations used in your calculations and provide units.