9. (i) Find the standard equation of an ellipse centered at (1, –2) with the horizontal major axis of length 10, and the vertical minor axis of length 8. (ii) Find the standard equation of a hyperbola with two foci at (2, 1) and (2, 7), and the length of its conjugate axis is 4. (iii) Find the standard equation of a parabola with the vertex (2, -3) and the directrix y = 1.

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