A 1.30-kg object is attached to a spring and placed on frictionless, horizontal surface. A horizontal force of 15.0 N is required to hold the object at rest when it is pulled 0.200 m from its equilibrium position (the origin of the x axis). The object is now released from rest from this stretched position, and it subsequently undergoes simple harmonic oscillations. (a)Find the speed of the object when its position is equal to one-third of the maximum value. (b) Find the acceleration of the object when its position is equal to one-third of the maximum value.