Please answer ASAP

1. How many decibels is the quietest sound the average human ear ca hear? In other words, what happens when we use I = I₀ in the equation for decibels?

2. If a sound is one million times louder than the quietest sound a human ear can hear (in other words, if I = 1,000,000I₀), what is the decibel level?

3. Sounds above 85dB are generally considered unsafe, and sustained exposure to these sounds can cause hearing damage over time. How many times louder than I₀ is a sound that measures 85dB?

4. One of the loudest concerts in history was by the rock band Who in 1976. The decibel level of this concert was 126dB. How many times louder than I₀ was this concert?

5. The intensity of a sound is measured in watts per square meter (w/m^2), which represents how much power (measured in watts) the sound is exerting on a given area (measured in square meters). The quietest sound the average human ear can hear, I₀, is known to measure 10⁻¹² W/m^2. Determine the decibel level of a sound with an intensity of 10⁻³ W/m^2. Would a sound with an intensity of 10⁻³ W/m^2 be considered unsafe?