State where the following functions are increasing, decreasing, concave up, and concave down, Also state where they have local maximum, local minimum, and inflection points. 1a) f(x) = x4. (6 pts) 1b) f ( ac ) = - 203 - 2. (6 pts) 1c) f(x ) = x+: where x > 0. (6 pts) 1d) f ( ac) = e (z-2)'. (7 pts)