Consider 23 (x, y, z) = 10xyz - 4x²y³ v(x, y, z) = 4xy² + 3y sin(2) Ğ(x, y, z) = Gx(x, y, z)i + Gy(x, y, z)j + Gz(x, y, z)k (a) Calculate i. Vo ii. V2 iii. V. (V×G) (b) At the point P = (1,2, 0) calculate the directions in which the function of does not change. (c) Find the directional derivative at the point P = (1, 2, 0) of the scalar function in the direction perpendicular to the level surface & = -4 at the point Q = (-1, 1, 0).