on a frictionless horizontal surface. The spring is compressed 4.0 cm and released from rest.

(a) Determine the maximum speed of the object.

1 m/s

(b) Determine the speed of the object when the spring is compressed 1.5 cm.

2 m/s

(c) Determine the speed of the object as it passes the point 1.5 cm from the equilibrium position.

3 m/s

(d) For what value of x does the speed equal one-half the maximum speed?