Problem 4: The graph below shows the transverse displacement versus time at a fixed location for a traveling wave with a wavelength of 13.92 m. 5.0 4.0 - 3.0 2.0 1.0 y(r, t) (cm) 0.0 -1.0 5.0 10.0 15.0 20.0 1(8) -2.0 -4.0 Part (a) What is the amplitude, in centimeters, of the wave? Numeric : A numeric value is expected and not an expression. A = cm Part (b) What is the frequency, in hertz, of the wave. Numeric : A numeric value is expected and not an expression. f : Hz Part (c) What is the propagation speed, in meters per second, of the wave? Numeric : A numeric value is expected and not an expression. V = m/s