2. Find a unit vector which is perpendicular to the surface of the paraboloid of revolution z = x² + y² at P(1,2,5) Evaluate fff [VFdy where F= (x² – 2z)i - xyj - 2xk and V is the closed volume bounded by the planes x = 0, y = 0, z = 0 and x + y + z = 1

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