A man of mass $60\ \text{kg}$ stands at one end of a boat of mass $40\ \text{kg}$ and length $5\ \text{m}$, floating at rest on still water, as shown in the figure. He walks to the other end of the boat. Ignoring the resistance of the water, how far does the boat move, and how far does the man move, measured from the shore?

Fig. 1: A man of 60 kg standing at one end of a 40 kg boat, 5 m long, floating on still water, about to walk to the other end.