You want to design the loop-the-loop toy. The idea is that a ball of mass m=0.01 kg and radius r = 5.0 cm will roll down an inclined track and around the loop without slipping. The ball starts from rest at a height of h meters above the tabletop that supports the whole track. If the radius of the loop is R = 0.25 m, determine the minimum height necessary for the ball to remain in contact with the track during the whole loop-the-loop journey.