Find the equation of an ellipse with Vertices (3,1) and 3,9) and minor axis=6

I got to (x-3)^2/9 +(y-5)^2/??? What is it over and how do you arrive at that answer?
Info below is what I got from the question/my work
2b=minor, 3=b
Center= (3,5)

(x-3)^2/9 +(y-5)^2/16