Two small insulating spheres with radius $7\mathrm{.}50102$ mm are separated by a large center$-$to$-$center distance of $0\mathrm{.}460$ mm $.$ One sphere is negatively charged, with net charge $-2\mathrm{.}20$ CC $,$ and the other sphere is positively charged, with net charge $3\mathrm{.}05$ CC $.$ The charge is uniformly distributed within the volume of each sphere.