An object is oscilla-ng in simple harmonic mo-on. The top graph shows how its displacement varies with -me. a. Which of the subsequent graphs, A to D, show how the kine-c energy ! of the object varies with -me? i. A ii. B iii. C iv. D b. Suppose the oscilla-ng mass m is 2 and has amplitude of 0.2 . If the maximum kine-c energy in part (a) is 4 , what is the period of the oscilla-on? i. 10 s ii. 0.2 s iii. 0.628 s iv. 3 s