$\"\"$

\

The function is $\"\"$ .

\

Find $\"\"$ .

\

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

\

$\"\"$

\

$\"\"$

\

Find $\"\"$ .

\

Substitute $\"\"$ and $\"\"$ in above expression.

\

$\"\"$

\

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

\

$\"\"$ .