The function is $\"\"$ .

Graph the function $\"\"$ .

$\"\"$

Observe the graph of $\"\"$ , it appears that the function have two relative minimums are in the interval $\"\"$ and in the interval $\"\"$ .

The function has two relative maximums are in the interval $\"\"$ and $\"\"$ .

Observe the end behavior of the graph, the function has no absolute extrema.

Locate the relative maximums and relative minimums on the graph.

$\"\"$

Relative minimums of $\"\"$ are at $\"\"$ and $\"\"$ .

Relative maximums are at $\"\"$ and $\"\"$ .

Relative minimums: $\"\"$ and $\"\"$ .

Relative maximums: $\"\"$ and $\"\"$ .