JS Secti... Par BD Consider the equation below. (If an answer does not exist, enter DNE.) f(x)=x48x2+7 - (a) Find the interval on which fis increasing. (Enter your answer using interval notation.) (-00,-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 -9 local maximum value 7 (c) Find the inflection points. (x,y) = ( - 2 3 x) (smaller x-value) 2 (x, y) = 3 x) (larger x-value) Find the interval on which fis concave up. (Enter your answer using interval notation.) 2 2 3 3 2 x Find the interval on which fis concave down.(Enter your answer using interval notation.)