Answer
See graph and explanations.
Work Step by Step
Step 1. Graph the equation as shown in the figure.
Step 2. We can identify from the given equation that $a=5, b=4$; thus $c=\sqrt {5^2-4^2}=3$
Step 3. As the center of the ellipse is at $(2,-1)$ and the major axis is vertical, the foci are $(2,2)$ and $(2,-4)$ as shown in the figure.
See graph and explanations.
