Use the function $f(x)=2x^4-16x^2-7$ to complete all parts of this question.

Round your answers to two decimal places.

$($a$)$ This function has three critical numbers $($CNs$)$ which are:

$C{N}_1$ is $x=($smallest$)$

$C{N}_2$ is $x=$ 'middle$)$

$C{N}_3$ is $x=($largest$)$

$($b$)$ Find the absolute maximum and minimum values of $f(x)$ on the interval $-4x1.$

The absolute maximum value of $f(x)$ is $q,$ and it occurs at $x=$

The absolute minimum value of $f(x)$ is $q,$ and it occurs at $x=$ type your answer...

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