Question 4. Let f (33,31) 2 yex. ('1) Find an equation of the tangent plane to the surface 2 = f(x, 3;) at the point (0, 2, 2). (ii) Find the linearization L(x, y) of f(a:, y) at the point (2,0,0). (iii) If 2 = f (3:, y) and (:0, 3;) changes from (1, O) to (0.9, 0.1), compare the values of A2 and dz