$\"\"$

(a)

The function is $\"\"$ over $\"\"$ .

Apply derivative with respect to $\"\"$ .

$\"\"$

(b)

Graph :

Graph the function $\"\"$ and its derivative $\"\"$ .

$\"\"$

(c)

The function is $\"\"$ .

Find the critical numbers by applying derivative .

$\"\"$

Equate it to zero.

$\"\"$

The critical numbers are $\"\"$ and $\"\"$ .

$\"\"$

(d)

Consider the test intervals to find the interval of increasing and decreasing in $\"\"$ .

Test intervals are $\"\"$ , $\"\"$ , $\"\"$ and $\"\"$ .

\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \

$\"\"$ is positive on the intervals $\"\"$ and $\"\"$ .

$\"\"$ is negative on the interval $\"\"$ and $\"\"$ .

$\"\"$

(a) The differentiation of the function is $\"\"$ .

(b)

$\"\"$

(d)

$\"\"$ is positive on the intervals $\"\"$ and $\"\"$ .

$\"\"$ is negative on the interval $\"\"$ and $\"\"$ .