$\"\"$

Observe the graph:

The graph is an ellipse.

The length of the major axis is $\"\"$ and length of the minor axis is $\"\"$ .

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

The parametric equations are $\"\"$ and $\"\"$ .

The parametric equations are $\"\"$ and $\"\"$ , $\"\"$ .

$\"\"$

The parametric equations are $\"\"$ and $\"\"$ , $\"\"$ .