Q) a) Show that the vector field F = (12x^2y + 6z^2, 4x^3-20yz, 12xz-10y^2) is irrotational, that is ∇ x F = 0.
(b) Find a potential function for F.
(c) Evaluate the work integral ∫ F. dr, where C is a path running from the origin to the point (1,2,1).