A small bead with a mass m = 15.0 g slides along the frictionless wire form shown in the figure. The three heights hA = 6.60 m, hB = 5.40 m, and hC = 2.90 m are all measured from the floor. The bead is released from rest at point A. (a) What is the speed of the bead at points B and C? vB = m/s (b) What is the net work done on the bead by the force of gravity as it moves from point B to C?