la) Find the level curve of the function A(x, y) = 4+2x + 3y where k = 10 b) Graph this "curve" in an xy-plane.2) Can two different level curves ( of the same function) cross? Why or why not?3) The x-axis points upward on a page. The y-axis points to the right. Which way does the z-axis point?6) The formula for the surface area of a cylinder is S(h, r) = 2n + 2arh. a Find the two first partial derivatives of S. b) Evaluate these partials if the height of the cylinder is 9.3 cm and the radius is 2.2 cm