Find the vertex, focus, and directrix for the following parabolas.

(a)
` ( y - 8 )^(2) = 16 ( x - 7) `
vertex : 
focus : 
directrix:   

(b)
` y^(2) - 14 y = 12 x - 7^(2) ` 

vertex : 
focus : 
directrix"   

(c)
` ( x - 8 )^(2) = 12 ( y - 4 ) ` 

vertex : 
focus : 
directrix"   

(d)
` x^(2) + 32 x = 4 y - 32 ` 

vertex : 
focus : 
directrix"   

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