The ball of mass { m }_{ b } is thrown at the suspended block of mass { m }_{ B } with velocity { v }_{ b } . If the coefficient of restitution between the ball and the block is e, determine the maximum height h to which the block will swing before it momentarily stops. Given: { m }_{ b } = 2 kg , { m }_{ B } = 20 kg , e = 0.8 , { v }_{ b } = 4 m/s , g = { 9.81 m/s }^{ 2 }