$\"\"$

\

The function is $\"\"$ .

\

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

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

(a)

\

$\"\"$

\

Substitute $\"\"$ and $\"\"$ in the above function.

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

(b)

\

$\"\"$

\

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

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

(c)

\

$\"\"$

\

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

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

(a) $\"\"$ .

\

(b) $\"\"$ .

\

(c) $\"\"$ .