MTH 31 (18) For the given functions, . find the x, y-intercepts whenever the calculations seem reasonable; . find the intervals on which f is increasing or decreasing; . find the local maximum and minimum values of f; . find the intervals of concavity and the inflection points. (a) f(x) = cos2(x) - 2 sin(x) for 0 S I S 27. ( b) f (2) = 2203 - gxe# - 60x- 20