This problem has multiple parts which are revealed sequentially after the preceding part has been answered correctly. Suppose 36 - +2 f(ze) = dt. 5 + cos2 (t) Find the critical number(s) of f(x). ANSWER: = 6, -6 E (Enter a number, a list of numbers separated by commas, or the word NONE.) Correct! Now, examine the behavior of the function f on intervals between the critical numbers by filling in the table below: (-00, -6) (-6, 6) (6, 00) sign of f': negative v negative v negative v behavior of f: decreasing v increasing v decreasing v