(25 points) A block of mass m = 2kg moves at a velocity of V = 1m/s. It collides with another block of mass m = 1kg that is initially moving at a velocity of V2, -2m/s. After the collision, the first block is moving at a velocity of Vf=-1m/s. Positive is in the +x direction. (a) (15 points) What is the velocity of the second block after the collision? (b) (10 points) Is the collision elastic or inelastic. Explain