The center is at $(\frac{1}{2},-3)$ and the radius is $2\sqrt{5}$.

The center is at $(-\frac{1}{2},3)$ and the radius is $2\sqrt{5}$.

The center is at $(\frac{1}{2},-3)$ and the radius is $20$.

The center is at $(-\frac{1}{2},3)$ and the radius is $20$.