Suppose you want to demonstrate the Doppler effect for deep-water waves, using a 2.50 Hz source moving toward a stationary observer. How fast would the source have to move through the water if the frequency of the waves seen by the observer is to be 3.00 times the frequency of the source? Since the sound is propagating on water, please use v = 0.195 m/s as the speed of the sound. (Answers that it says are wrong: 0.13 m/s and 0.39 m/s)