A 0.25 kg block on a smooth horizontal surface is attached to an ideal spring whose spring constant is 48 N/m. The block is pulled so that the spring is stretched 0.15 m from the equilibrium position and is released from rest. The block is oscillating on the surface. Determine the following, (a) the total energy of the system (b) the speed of the block as it passes the equilibrium position (c) the magnitude of acceleration of the block when it is at 0.10 m from the equilibrium position