In the diagram below, a collar with mass m is attached to a spring with spring constant k and an unstretched length lo. The collar moves along a smooth rail that is oriented vertically. The top part of the rail is bent in a circular shape with a radius R and a center of curvature at point and the bottom part of the rail is straight and vertical with a length d as shown in the diagram. When the collar is at point A, the collar is moving at a speed v A to the right. Determine the speed of the collar at point B. Use the values in the table below.