According to the alpha-particle model of the nucleus, some nuclei consist of a regular geometric arrangement of alpha particles. For instance, the nucleus of 12C consists of threee alpha particles arranged in an equilateral triangle. Assuming that the distance between pairs of alpha particles is 3.0 x 10^-15 m, what is the electric energy (in eV) of this arrangement of alpha particles? Treat the alpha particles as pointlike particles with charge +2e.