The integral is $\"\"$ .

Here $\"\"$ , $\"\"$ and $\"\"$ .

Graph the area the function of $\"\"$ under given intervals.

(a)

Graph :

Graph the function.

$\"\"$

The above graph consists of two right angle triangles $\"\"$ and $\"\"$ .

$\"\"$ .

Consider $\"\"$

$\"\"$

Consider $\"\"$ .

$\"\"$ .

Substitute $\"\"$ and $\"\"$ in $\"\"$ .

$\"\"$ .