Let S be the closed surface formed by the hemnisphere x+y +z =a² , zz0, and the x-y plane. Let V be the enclosed volume of the hemisphere. A vector function F is defined as F- 2xz, yz, z Q4. (a) Evaluate the surface integral FindS directly, where n is the outward pointing unit normal vector on S. (b) Evaluate the surface integral in (a) using the Divergence Theorem of Gauss

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