A 50.7 kg person is standing on the edge of a cliff on a heavy board. The board is 8 meters long and has a mass of 63.7 kg. The board is placed such that 2.2 meters of the board overhangs the cliff.

What is the maximum distance in meters beyond the cliff's edge that the person can walk out on the board before it starts to tip? (i.e. when the Center Of Mass is at the cliff's edge).