Askateboarder is moving 5.25 m/s when he starts to roll up a frictionless hill. how much higher is he when he comes to a stop

Amass weighing 24 pounds, attached to the end of a spring, stretches it 4 inches. initially, the mass is released from rest from a point 8 inches below the equilibrium position. find the equation of motion. (use g = 32 ft/s2 for the acceleration due to gravity.)