Consider the function below. ((x) = 9vxe-* (a) Find the interval on which / is increasing. (Enter your answer using interval notation.) Find the interval on which / is decreasing. (Enter your answer using interval notation.) (b) Find the local maximum value of f. (c) Find the inflection point. (x, 1) = ( Find the interval on which / is concave up. (Enter your answer using interval notation.) Find the interval on which / is concave down. (Enter your answer using interval notation.)