sider the equation below f x 4x 12x a Find the intervals on which fis increasing Enter your answer using interval notation 96x 2 Find the interval on which f is decreasing Enter your answer using interval notation b Find the local minimum and maximum values of f local minimum value local maximum value c Find the inflection point x y Find the interval on which fis concave up Enter your answer using interval notation Find the interval on which fis concave down Enter your answer using interval notation