Find the standard form of the equation of the specified ellipse.

Please help me with these math Pre-calc problems!!!!!

1. Find the standard form of the equation of the specified ellipse.
Center: (8, 3); Vertex: (15, 3); Minor axis of length 8

2.Find the standard form of the equation of the specified ellipse.
Center: (0,0) Foci: (0, -2 sqaure root of 15) (0, 2 square root of 15) Vertices; (0,8) (0, -8)

3.Find the standard form of the equation of the specified ellipse.
Center: (1, 8); Vertex: (6, 8); Minor axis of length 6

1.) (x-8)^2 / 16 + (y-3)^2 / 49 = 1

2.) x^2 / 44 + y^2 / 64 = 1

3.) (x-1)^2 / 25 + (y-8)^2 / 9 = 1

I do I have some doubts about number 2? Can you explain how you reached that answer please. Thank you.

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