Consider a square which is $1\mathrm{.}0$ m on a side. Charges are placed at the corners of the square as follows: $+4\mathrm{.}0\backslash$mu C at $(0,0)$; $+4\mathrm{.}0\backslash$mu C at $(1,1)$; $+3\mathrm{.}0\backslash$mu C at $(1,0)$; $-3\mathrm{.}0\backslash$mu C at $(0,1).$ What is the magnitude of the electric force on the $+4\mathrm{.}0\backslash$mu C at $(1,1)?$