A massless spring of constant k = 105.2 N/m is fixed on a level frictionless track. A block of mass m = 0.225-kg is pressed against the spring and compresses it a distance d = 0.153 m. The block, which is initially at rest, is then released and travels toward a circular loop-the-loop of radius R. The entire track and the loop-the-loop are frictionless. Determine the maximum radius Rmax, of the loop-the-loop, that enables the block to just make it through the top of the loop-the-loop at point C. c R m wwww