Find the equation of the tangent plane to the surface z = 4y 9 at the point (3,-3,-45). Z= Note: Your answer should be an expression of x and y: e.g. "3x - 4y +6" Question 2 Find the equation of the tangent plane to the surface z=e-22/17 In (4y) at the point (4, 1, 0.8659). Z= Note: Your answer should be an expression of x and y; e.g. "5x + 2y - 3* Question 3 Find the linearization L (x, y) of the function f (x, y) = 21-16x 1y at (-1, -2). L (x, y) = Note: Your answer should be an expression in x and y; e.g. "3x - 5y +9" Question 4 Find the linear approximation of the f(x, y) = Answer: f(x, y) x x+y at the point (1,5).