$\"\"$

The integral is $\"\"$ .

(a)

Evaluate integral using integration by parts.

Consider $\"\"$ .

Integration by parts is $\"\"$ .

$\"\"$

Integrate on both sides

$\"\"$

Differentiate on each side.

$\"\"$ .

Substitute the corresponding values in the integration by parts formula.

$\"\"$

$\"\"$ .

$\"\"$

(b)

Evaluate integral using substitution.

Let $\"\"$ .

$\"\"$

Substitute the corresponding values.

$\"\"$

$\"\"$ .

$\"\"$

$\"\"$ .