A string on a musical instrument vibrates in its fundamental mode with nodes on either end. The length of the vibrating segment is 0.39 m. The maximum transverse velocity at a point in the middle of the string is 3.8 m/s and the maximum transverse acceleration is 8.4 x 10^3 m/s^2. Compute the amplitude for the standing wave and the wave speed for transverse traveling waves on the string.