A string of length 1.20 m is fixed at both ends and is set into transverse vibrations in its fourth harmonic. The speed of transverse waves on the string is 180 m s−1. Answer the following:
(i) Calculate the wavelength of the standing wave produced.
(ii) Find the positions of all nodes measured from the left end of the string.
(iii) Determine the distance of the second antinode from the left end.