Two 2.0 kg bodies, A and B, collide. The velocities before the collision are A = (15i + 30j) m/s and B = (-10i + 5j) m/s. After the collision, ′A = (-5i + 20j) m/s. What are (a) the x-component and (b) the y-component of the final velocity of B? (c) What is the change in the total kinetic energy (including sign)?