A string is stretched and fixed at both ends, 130 cm apart. The mass of the string is 3.1 grams, and the tension in it is 460 N. Standing waves are set up in the second harmonic in this string. Calculate the following: 1- speed of the waves in the string. Input this answer in canvas in m/s. 2- frequency of vibrations in the string. (write this answer in your paper) 3- wavelength of the second harmonic. (write this answer in your paper)