$\"\"$

\

The values are $\"\"$ , $\"\"$ and $\"\"$ .

\

Find $\"\"$ .

\

The formula for $\"\"$ -values is $\"\"$ .

\

Substitute $\"\"$ , $\"\"$ and $\"\"$ .

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$ .

\

$\"\"$

\

$\"\"$ .