$\"\"$

The equation is $\"\"$ , $\"\"$ .

$\"\"$ is a cylinder with axis as $\"\"$ -axis and radius $\"\"$ .

$\"\"$ is a plane normal to $\"\"$ -axis.

$\"\"$ , $\"\"$ is intersection of the plane and the cylinder.

All points on a circle with radius $\"\"$ with center on the $\"\"$ -axis that is contained in the plane $\"\"$ .

$\"\"$

All points on a circle with radius $\"\"$ with center on the $\"\"$ -axis that is contained in the plane $\"\"$ .