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12. A student wants to build an awesome pan flute consisting of tubes that are open at both ends that can play notes with the following frequencies: 200.0 Hz 300.0 Hz 400.0 Hz 500.0 Hz a. Draw a diagram of the pan flute, including what the sound waves inside would look like (similar to the previous question). 2 b. If the speed of sound is 345 m/s, determine the lengths that the four tubes would need to be. 1900 SIesunov A 4 vent muibale uce lo beege elgroo