Please help with the ones i got wrong

Consider the function below. (If an answer does not exist, enter DNE.) F(x) = =x4 - 4x2+ 2 (a) Find the interval of increase. (Enter your answer using interval notation.) (-2,0), (2,00) Find the interval of decrease. (Enter your answer using interval notation.) (-0o, - 2), (0,2) (b) Find the local minimum value(s). (Enter your answers as a comma-separated list.) 6 Find the local maximum value(s). (Enter your answers as a comma-separated list.) 2 (c) Find the inflection points. 2V3 (x, y ) = \\ 3 X (smaller x-value) 22 ( x, y ) = 9 x (larger x-value) Find the interval where the graph is concave upward. (Enter your answer using interval notation. 2V3 3,00 X