5. In a propagating medium, a sinusoidal wave with the equation: yl(x, t) =4.6 sin(0.5xx - 400nt) mm. a. Determine the wavelength, frequency, amplitude and speed of wave propagation. b. If at the same place, same time and in the same direction, too propagate the second wave with the equation: y2(x, t) = 4.60 sin(0.5xx - 400xt + 0.80m ) mm Determine the wave equation for the superposition of the two waves