A 131.8-kg tackler moving at 3.25 m/s tackles a 105.6-kg tailback moving at 6.35 m/s in the opposite direction. a.) What will be their mutual velocity immediately after the collision? b.) What is the change in momentum of the tackler? c.) What is the change in momentum of the tailback? d.) What is the change in the momentum of the system consisting of the tackler and the tailback? e.) If the exchange of momentum lasts 0.285 s, what force did the tackler impart on the tailback? f.) If the exchange of momentum lasts 0.285 s, what force did the tailback impart on the tackler?