$\"\"$

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

$\"\"$

$\"\"$ .

Equation of a sphere:

An equation of a sphere with center $\"\"$ and radius is $\"\"$ is $\"\"$ .

Compare sphere equation with standard form.

Here center $\"\"$ and radius $\"\"$ .

$\"\"$

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

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