$\"\"$

The iterated integral is $\"\"$ .

Conversion of rectangular to polar coordinate:

$\"\"$

Region bounded by the integral :

$\"\"$

So $\"\"$ .

The region R $\"\"$ is a quarter circle of radius $\"\"$ . It can be described in polar coordinates as $\"\"$ .

$\"\"$

Now evaluate the integral $\"\"$ .

$\"\"$

$\"\"$ .