Consider F and C below. F(x, y, z) = yzi+xzj + (xy + 18z) k C is the line segment from (1, 0, -3) to (4, 6, 2) (a) Find a function f such that F = Vf. f(x, y, z)= (b) Use part (a) to evaluate Vf. dr along the given curve C.

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