The level of sound (in decibels) with an intensity of I is (I) = 10 log

The level of sound β (in decibels) with an intensity of I is β(I) = 10 log₁₀(I/I₀), where I₀ is an intensity of 10^-16 watt per square centimeter, corresponding roughly to the faintest sound that can be heard. Determine β(I) for the following.
(a) I = 10^-14 watt per square centimeter (whisper)
(b) I = 10^-9 watt per square centimeter (busy street corner)
(c) I = 10^-4 watt per square centimeter (threshold of pain)