A mass of m is suspended from one end of a string. The total length of the string is 1.0 m and its mass is 5 g. The length of the string between support and pulley is D = 0.9 m. The string is vibrating as shown with a frequency of 30 Hz. Discover (a) the speed of a transverse wave in the string, (b) the mass m being suspended, (c) the wavelength of the wave.