A bungee jumper undergoes simple harmonic motion with amplitude 4.6m and frequency 0.145Hz . Assume the bungee jumper follows the simple harmonic motion equation x=Acos(wt). Determine the bungee jumper's velocity at 0.25 s. Determine the bungee jumper's velocity at 0.50 s. Determine the bungee jumper's velocity at 1.0 s.