11. (10 points) The figure below shows the graph of f'(x), the derivative of an unknown function f() on the interval [-3, 3]. (a) Sketch the graph of f"(I). 4 (b) Use these two graphs to find: 3 y = f'(x) 2 (i) the intervals where f(x) is in- 1 creasing (ii) the intervals where f (z) is con- 3 2 cave down. (iii) the critical values of f (I). -2 (iv) the x-coordinate(s) of the points of inflection of f(z)