Write an equation for the ellipse foci (9,0) vertices (15,0)

1. X^2/15+y^2/12=1
2. X^2/144+y^2/225=1
3. X^2/225+y^2/144=1
4. X^2/12+y^2/15=1

Correct answer: 3. X^2/225 + y^2/144 = 1