In an action movie, the hero dangles his archenemy over the edge of a cliff. The archenemy's mass is 68 kg and his center of mass is 44 cm horizontally past the edge of the cliff. The hero's center of mass is 15 cm horizontally from the edge of the cliff. What is the smallest value of the hero's mass so that the CM of the two is not out past the edge of the cliff (which would make them both fall into the ravine below)? Is this scenario reasonable?