Consider the equation below. (If an answer does not exist, enter DNE.) f(x) = x4 − 8x2 + 5 (a) Find the interval on whic

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Consider the equation below. (If an answer does not exist, enterDNE.)
f(x)= x4 − 8x2 + 5
(a) Find the interval on which f isincreasing. (Enter your answer using interval notation.)
Find the interval on which f is decreasing.(Enter your answer using interval notation.)
(b) Find the local minimum and maximum valuesof f.
(c) Find the inflection points.(x, y) =
(smaller x-value)(x, y) =
(larger x-value)Find the interval on which f is concave up.(Enter your answer using interval notation.)
Find the interval on which f is concavedown.(Enter your answer using interval notation.)