A string with both ends held fixed is vibrating in its third harmonic. The waves have a speed of 186 m/s and a frequency of 225 Hz . The amplitude of the standing wave at an antinode is 0.390cm . Calculate the amplitude at point on the string a distance of 15.0 from the left-hand end of the string. Calculate the maximum transverse velocity of the string at this point. Calculate the maximum transverse acceleration of the string at this point.