A. Tanya jumps off of a raft to the left with both initially at rest. Tanya has a mass of 65 kg and the mass of the raft is 120 kg. After she jumps off the raft, she has a velocity of 1.5 m/s [left] after 2 seconds. a) With what force does Tanya apply to the raft? b) What is raft's velocity after 2 seconds?