3.) The level of sound, B (in decibels) with an intensity of I (in watts per m2) is given by: B = 10 108 7' -, where Io = 10-12 watts per m (a measure of intensity for the faintest sound that can be heard by the human ear). Installing a muffler on a car reduces the noise level from 88 decibels to 72 decibels. Find the intensity level with and without the muffler. Round to 5 decimal places