$\"\"$

The standard form of ellipse centered at origin with vertical major axis (where $\"\"$ ) is $\"\"$ .

The vertices of the ellipse are $\"\"$ and foci is $\"\"$ .

The vertices and foci are x - coordinates.So, the major axis is vertical.

The endpoints of the major axis lie eight units to the right and left of the center at $\"\"$ .

So, the denominator of $\"\"$ - term is $\"\"$ . $\"\"$

We know that $\"\"$ .

$\"\"$ (Substitute $\"\"$ )

$\"\"$ (Simplify)

The standard form of ellipse is $\"\"$ . $\"\"$

The standard form of ellipse is $\"\"$ .