Let F = –9zi+ (xe"² – 2xe³) }+ 12 . Find ſg F ·dÃ, and let S be the portion of the plane 2x + 3z = 6 that lies in the first octant such that 0 < y < 4 (see figure to the right), oriented upward. Explain why the formula F · Ã cannot be used to find the flux of F through the surface S. Please be specific and use a complete sentence.

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