25. For each function, use the graph of f(x) to sketch a possible function f (x). [5 Marks] a. b . 12 2 0 12 / 12 26. A piece of sheet metal, 60 cm by 30 cm, is to be used to make a rectangular box with an open top. Determine the dimensions that will give the box with the largest volume. [5 Marks] 60 cm X 30 cm