Aman with a mass of 80.0 kg is out fishing with his daughter, who has a mass of 25.0 kg. they are initially sitting at opposite ends of their 3.0-m boat, which has a mass of 60.0 kg and is at rest in the middle of a calm lake. the man and the daughter then carefully trade places. we will neglect any resistive forces between the boat and the water. how far has the boat moved, once the man and his daughter have finished trading places?