Charge q$1=+5\mathrm{.}20$  nC is on the x$-$axis at x$=0$ and an unknown charge q$2$ is on the x$-$axis at x$=-4\mathrm{.}00$  cm$.$ The total electric force that q$1$ and q$2$ exert on a third charge q$3=+2\mathrm{.}00$  nC on the x$-$axis at x$=4\mathrm{.}00$  cm is in the $+$ x$-$direction and has magnitude $77\mathrm{.}0$ mu N$.$ Find the x$-$component of the force that q$1$ exerts on q$3.$Express your answer in micronewtons. Find the x$-$component of the force that q$2$ exerts on q$3$.Express your answer in micronewtons. Find the charge q$2$ .

 

Express your answer in nanocoulombs.