Consider the vector field F (x, y, z) = (5z + 4y) i + (2z + 4x) j + (2y + 5x) k. Find a function f such that F = nabla f and/(0, 0, 0) = 0. f(x, y, z) = Suppose C is any curve from (0, 0, 0) to (1, 1, 1). Use part a