Answer Happy

need help with b and c
Consider the equation below. (If an answer does not exist, enter DNE.) f(x) = x4 - 50x² + 1 (a) Find the interval on which fis increasing. (Enter your answer using interval notation.) (-5,0) U (5,00) Find the interval on which fis decreasing. (Enter your answer using interval notation.) (-∞, -5) U (0,5) (b) Find the local minimum and maximum values of f. local minimum value -5,5 local maximum value 0 (c) Find the inflection points. (x, y) = (x, y) = (smaller x-value) (larger x-value) Find the interval on which f is concave up. (Enter your answer using interval notation.) Find the interval on which fis concave down. (Enter your answer using interval notation.)