Afisherman of mass m = 74.7~\mathrm{kg}m=74.7 kg is sitting in a canoe with mass m = 164~\mathrm{kg}m=164 kg on a warm summer day. the canoe has length l=7.72~\mathrm{m}l=7.72 m and he is sitting at the very end of the canoe. after several hours of not catching anything, he decides to try his luck from the other end of the boat, so he gets up and walks over to the other end of the canoe, then sits down again. assuming that the water applies no frictional force on the canoe, what is the (magnitude of the) distance the canoe itself has traveled in this process?