3. The following graph represents the second derivative f" (x) of the function f(x). On which concave down? interval is the graph of the function f(x) concave up, and on which interval is the graph [2 marks] 4. The vertical asymptotes of f (x) = 2 are: a) x= 0&x=1 b)x =1&x=-1 C ) x = 1 &x =2 d) x =0, 1, -1 [1 mark] 5. Find the absolute maximum of the function f(x)=x(x +1)(x -1) on the interval OSX