Two particles, one with charge $-7\mathrm{.}97C$ and one with charge $2\mathrm{.}71C,$ are $2\mathrm{.}84cm$ apart.

What is the magnitude $|vec(F)|$ of the force that one particle exerts on the other?

$|vec(F)|=$

Two new particles, which have an identical positive charge $q_3,$ are placed the same $2\mathrm{.}84cm$ apart, and the force between them is measured to be the same as that between the original particles.

Determine $q_3$ in microcoulombs.

$q_3={?}_{\text{I}\text{n}\text{c}\text{o}\text{r}\text{r}\text{e}\text{c}\text{t}}C$