A circle has the equation x^2−8y−6x+y^2=4.
A: What value should be added to each side of the equation to complete the square for the x's?
B: What value should be added to each side of the equation to complete the square for the y's?
C: What is the standard form of the equation?
Select three answer choices: one for question A, one for question B, and one for question C.
A: 3
B: 4
C: (x−3)2+(y−4)2=29
A: 36
B: 16
C: (x−3)2+(y−4)2=16
A: 9
C: (x−3)2+(y−4)2=25
B: 64