Five clarinets sit a distance of 11.5 m from the audience. Together the intensity level of the music is 78.5 dB
I) What is the intensity (in W/m^2) of one clarinet?
II) What is the power output (in W) of one clarinet?
III) If 5 identical clarinet players are seated 1.5 m behind the previous players, then what is the total intensity level (in dB) hear by the audience?