$\"\"$

The equation of the sphere is $\"\"$ .

The general equation of a sphere with center at $\"\"$ and radius $\"\"$ is $\"\"$ .

Convert the given equation into general sphere equation.

$\"\"$

$\"\"$ .

Compare equation with general form.

Here $\"\"$ and $\"\"$ .

Center of the sphere is $\"\"$ and radius is $\"\"$ .

$\"\"$

Center of the sphere is $\"\"$ and radius is $\"\"$ .