Athin taut string is fixed at both ends and stretched along the horizontal x-axis with its left end at x = 0. it is vibrating in its third overtone, and the equation for the vertical displacement of any point on the string is y(x, t) = (1.22 cm) sin[(14.4 m-1)x] cos[(166 rad/s)t]. (a) what are the frequency and wavelength of the fundamental mode of this string? (b) how long is the string? (c) how fast do waves travel on this string?