A stretched string has a mass per unit length of 3.46 g/cm and a tension of 15.5 N. A sinusoidal wave on this string has an amplitude of 0.187 mm and a frequency of 119 Hz and is traveling in the negative direction of an x axis. If the wave equation is of the form y(x,t) = ym sin(kx + wt), what are (a) ym, (b) k, and (c) w, and (d) the correct choice of sign in front of w? (a) Number i Units (b) Number i Units (c) Number Units (d)