#### Answer

Stable equilibria: 6 nm and 14 nm
Unstable equilibrium: 11 nm

#### Work Step by Step

In order to do this problem, first plot all of the given points in a coordinate plane. Then, look for the places where the graph has a slope of 0: these will be the equilibria. Finally, determine stability. If the equilibrium is a mimimum, it will be stable, but if it is a maximum, it will be unstable.