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

(a)
` ( y - 7 )^(2) = 20 ( x - 8) `
vertex : 
focus : 
directrix:   

(b)
` y^(2) - 16 y = 12 x - 8^(2) ` 

vertex : 
focus : 
directrix"   

(c)
` ( x - 7 )^(2) = 12 ( y - 5 ) ` 

vertex : 
focus : 
directrix"   

(d)
` x^(2) + 40 x = 4 y - 28 ` 

vertex : 
focus : 
directrix"   

Get help: VideoVideoVideoVideo

Box 1: Enter your answer as an n-tuple of numbers. Example: (2,5.5172)
Enter DNE for Does Not Exist

Box 2: Enter your answer as an n-tuple of numbers. Example: (2,5.5172)
Enter DNE for Does Not Exist

Box 3: Enter your answer as an equation. Example: y=3x^2+1, 2+x+y=3
Be sure your variables match those in the question

Box 4: Enter your answer as an n-tuple of numbers. Example: (2,5.5172)
Enter DNE for Does Not Exist

Box 5: Enter your answer as an n-tuple of numbers. Example: (2,5.5172)
Enter DNE for Does Not Exist

Box 6: Enter your answer as an equation. Example: y=3x^2+1, 2+x+y=3
Be sure your variables match those in the question

Box 7: Enter your answer as an n-tuple of numbers. Example: (2,5.5172)
Enter DNE for Does Not Exist

Box 8: Enter your answer as an n-tuple of numbers. Example: (2,5.5172)
Enter DNE for Does Not Exist

Box 9: Enter your answer as an equation. Example: y=3x^2+1, 2+x+y=3
Be sure your variables match those in the question

Box 10: Enter your answer as an n-tuple of numbers. Example: (2,5.5172)
Enter DNE for Does Not Exist

Box 11: Enter your answer as an n-tuple of numbers. Example: (2,5.5172)
Enter DNE for Does Not Exist

Box 12: Enter your answer as an equation. Example: y=3x^2+1, 2+x+y=3
Be sure your variables match those in the question