6. Calvin and his pet tiger Hobbes are sledding on a 50 m high hill. They start at rest at the top of the hill and arrive at the bottom of the hill with a speed of 25 m/s. As they slide down the hill, Hobbes fears for his life and digs his claws into the snow, doing -3,000 J of work on the sled to slow it down. If the combined mass of Calvin, Hobbes and the sled is 50 kg, how much work Wy is done by friction as the sled slides down the hill? A) Wp=-58751] B) Wy=-42751] C) Wy=-93501] D) Wy=-825] E) W;=-6,185]