A sound wave with amplitude Xo is measured by an observer to have an intensity of To when the observer is standing 4.0 meters from the source. Which best describes the amplitude of a sound wave and distance from the source where it will be measured with an intensity of 16/,? O Increase the amplitude to 8x, and stand 2 meters from the source. Increase the amplitude to 4x, and stand 10 meters from the source. O Increase the amplitude to 2x, and stand 2 meters from the source. O Increase the amplitude to 4x, and stand 8 meters from the source.