Find the equation of the tangent plane to the surface of f

Question

Consider the function f (x, y) = x² ln( y² )

(a) Find the equation of the tangent plane to the surface of f (x, y) at the point (3, 1/e).

(b) Show the tangent plane to the surface at the point (3, 1/e) by plotting both on the same graph.

Select a suitable viewpoint for your graph so that you can see where the plane is tangential.