3. -/1 points Consider the following function TanApCalc104. R. 008 + (a) Find the intervals where the function fis increasing and where it is decreasing Increasing o (-4, 4) o (0, 17) (4, o») o (17, ») o f is never increasing Decreasing: o (-4, 4) o (0, 17) o (4, ) o (17, ») o f is never decreasing (b) Find the relative extrema of f. (If an answer does not exist, enter DNE.) relative maximum (x, y) relative minimum (x,y) (c) Find the intervals where the graph of f is concave upward and where it is concave downward Concave upward 3 2 16 3 0 16 o fis never concave upward Concave downward: 16 4 16 (í´-) 2 o fis never concave upward (d) Find the inflection points, if any, of f. (If an answer does not exist, enter DNE.) (x, y) =