5. A spring is compressed by 4cm from the equilibrium with a mass block of M = 0.5kg attached, as shown. After the mass is released, it slides on the track to a height h. The track is frictionless. You must use conservation of energy. equilibrium k=250N/m M=0.5kg x=4cm' friction for d=3m a) What is the spring potential energy before the mass is released? Answer in J. b) What is the kinetic energy of the mass as it passes through the equilibrium? Answer in J. c) What is the kinetic energy of the mass as it passes the end of the segment d? Answer in SI units. d) What height will the mass reach when it comes to a stop? Answer in SI units.