$\"\"$

Observe the graph:

The graph of the function is increases for $\"\"$ .

The graph of the function is decreases for $\"\"$ .

The deriavtive of the function greater than zero for $\"\"$ .

The deriavtive of the function less than zero for $\"\"$ .

$\"\"$ for $\"\"$ .

From the graph $\"\"$ has critical number at $\"\"$ .

Plot the graph with above conditions.

$\"\"$

The derivative of the graph of the function is

$\"\"$ .