Electric flux through a square.

A flat square surface with sides of length $$L$$ is described by the equations $x=L, \quad 0\leq y \leq L, \quad 0\leq z \leq L.$ Find the electric flux in $$\mbox{V}\cdot \mbox{m}$$ through the square due to a positive point charge $$q=1~\mbox{nC}$$ located at the origin $$(0,0,0)$$.

Details and assumptions

$\epsilon_{0}=8.85 \times 10^{-12}~\mbox{F/m}$

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