Please help I need the answer quickly.

Compare these two waves: the blue and orange waves have the same pitch, but the blue wave is louder. the blue and orange waves have the same volume, but the blue wave has a higher pitch. the orange wave has a higher pitch, but the blue wave is louder. the blue wave has a higher pitch, but the orange wave is louder.

What is the measure of ac? 5 units 13 units 26 units 39 units

Answer this question! 30 points and brainliest! only if you know the answer.