A $3\mathrm{.}0$ C point charge and a $90$C point charge are initially infinitely far apart. How much work does it take to bring the $3\mathrm{.}0$C point charge to x $=3\mathrm{.}0$ mm$,$ y $=0\mathrm{.}0$ mm and the $9\mathrm{.}0$ micro coulomb point charge to x$=-3\mathrm{.}0$mm$,$ y$=0\mathrm{.}0$mm$?$