Determine the vertex, focus, and directrix of the parabola and sketch its graph.y2 - 12y + 8x = -60
A. vertex: (6, -3)
focus: (6, -5)
directrix: y = -1
B. vertex: (6, -3)
focus: (6, -1)
directrix: y = -5
C. vertex: (-3, 6)
focus: (-1, 6)
directrix: x = -5
D. vertex: (-3, 6)
focus: (-5, 6)
directrix: x = -1
Answer: D
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