Block A weighing 64.4-lb compresses the spring of stiffness 2001b/ft two feet as shown. Block slides along the frictionless curved section of radius 4 feet. Once on the horizontal section block A slides on a surface with a coefficient of friction of 0.2 for 10 feet before hitting block B which is initially at rest Block B weighs 128.8-lb. After the impact B slides to the right along a frictionless surface until it is stopped by a spring of unknown stiffness. The amount of compression of the second spring is 2 feet. Find: a) speed of A at position 2, b) speed of A before the impact, c) speed of A and B after the impact, c) spring constant of the right-end spring. The coefficient of restitution between A and B is 0.8