A positive point charge q$1$

$=3\mathrm{.}5\backslash$mu C

is located at x

$=0,$ y

$=0\mathrm{.}30$ m

$,$ a negative point charge q$2$

$=-3\mathrm{.}5\backslash$mu C

is located at x

$=0,$ y

$=-0\mathrm{.}30$ m

$.$ A third point charge Q

$=5\mathrm{.}0\backslash$mu C

is located at x

$=0\mathrm{.}40$ m

$,$ y

$=0.$