An 0.64-kg object is attached to one end of a spring, as in Fig. 10.14 and the system is set into simple harmonic motion. The displacement x of the object as a function of time is shown in the drawing above. Please take the values of A and T as: A = 0.087 m and T = 1.8 s. With the aid of this data, determine ive already calculated amplitude, angular frequency, spring constant. I cant figure out how to calculate these: (d) the speed of the object at t = 3.6 s (e) and the magnitude of the object's acceleration at t = 3.6 s any tips??