physic

At the end of her bungie jump, Krystal is slowly bouncing up and down. Their motion as a function of time is described by the following equation, where y is in metres and tis in second. y = (2.5 m) cos(1.4t + 0.7) Determine the following parameters, including units if appropriate; a) amplitude, 13) angular frequency, c) frequency (Hz), d) period, e) Krystal's maximum speed