.

2 2 3111(3) on the interval [713 i- Let f(.'13) = (a) Find all critical points and classify them. Express the critical points in the form (a, f(a)). Show all your work. (b) Find the global maximum and global minimum of f in the given interval. Justify your answer. (c) Determine all intervals of concavity. Show all your work. (d) Sketch the graph of f($) by hand (do not show steps, just a sketch of the final graph)