A triangle in space formed by three points, each point has a uniform infinite line charge cross it. The first point had located by the intersection of two infinite sheets z=8 & y=O. The second point had located by the intersection of two infinite sheets z=-8 & y=0-8. The third point had located by the intersection of two infinite sheets z=-8 & y=8. Find the electric flux intensity at the center of this triangle?

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