Consider the following function If an answer does not exist enter DNE f x 7 xe x a Find the interval s on which f is increasing Enter your answer using interval notation Find the interval s 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 TIME Find the interval s on which f is concave up Enter your answer using interval notation Find the interval s on which f is concave down Enter your answer using interval notation