Choose either increase or decrease for the first blank space. Then place the correct numeric answer in the second blank space. Show your work.

A. A positive unit change in the x direction at the point P(1, 1, 0) will cause the function f ( x, y, z) = x3 - xyz - z to by units. B. A positive unit change in the y direction at the point P(1, 1, 0) will cause the function f (x, y, z) = x3 - xyz - z to by units. C. A positive unit change in the z direction at the point P(1, 1, 0) will cause the function f ( x, y, z) = x3 - xyz - z to by units. Work for above problems