21. Use Divergence Theorem to find the volume of a quadric surface z² + 3y + 4x² = 3 with the solid region bounded by the xy-plane and y=-2. Let F = xzi + 3yzj + x²k. A. 21.60 cu. units C. 43.20 cu. units B. 86.40 cu. units. D. 64.80 cu. units.

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