Q32 Suppose the point P = (To, yo, 20) lies on the graph = = f(x, y). C Give the formula for tangent plane to this graph at P. b z = f(x, y) is a level surface of F(x, y, 2) = f(x, y) - 2. Use the gradient of F to write the equation of the tangent plane to F(r, y, =) =0 at P. C Are these equations equivalent? Justify your answer with algebra