A 0.52 kg object connected to a light spring with a force constant of 19.4 N/m oscillates on a frictionless horizontal surface. If the spring is compressed 4.0 cm and released from rest. (a) Determine the maximum speed of the object. cm/s (b) Determine the speed of the object when the spring is compressed 1.5 cm. cm/s (c) Determine the speed of the object when the spring is stretched 1.5 cm. cm/s (d) For what value of x does the speed equal one-half the maximum speed? cm