Shown is a traveling wave at t = 0 and at t = 2.4 s when the red dot has oscillated 3 cycles (position is given in cm and time is given in s). At t = 0. the red dot is moving downward (i.e. 0<0). Measure the relevant properties of this wave and determine the wave function of the wave. Make sure including correct unit. Show your work in finding the wave speed and frequency