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Find the vertex, focus, and directrix for the following parabolas.
(a)
` ( y - 5 )^(2) = 4 ( x - 1) `
vertex :
focus :
directrix:
(b)
` y^(2) - 2 y = 16 x - 1^(2) `
vertex :
focus :
directrix"
(c)
` ( x - 7 )^(2) = 16 ( y - 1 ) `
vertex :
focus :
directrix"
(d)
` x^(2) + 8 x = 4 y - 20 `
vertex :
focus :
directrix"
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