= 4. (3 points) The surface area of a box like the one pictured here is given by A 2lw+2lh+2wh. The length l of this box is 34 inches, the width w is 24 inches, and the height h is 17 inches. If the length and width were to shrink by 0.1 inches and the height were to stretch by 0.2 inches, use differentials to estimate the change in surface area of the box. Does the surface area increase or decrease, and by how much? Include a unit in your answer. W (0,0,0) l (1,1,1) h