Physics homework

A block of mass m = 3.08 kg is attached to a spring which is resting on a horizontal frictionless table. The block is pushed into the spring, compressing it by 5.00 cm, and is then released from rest. The spring begins to push the block back toward the equilibrium position at x = 0 cm. The graph shows the component of the force (in N) exerted by the spring on the block versus the position of the block (in cm) relative to equilibrium. Use the graph to answer the following questions.