ABC is a triangle and AD is the median. If the coordinates of A are (4,7,-8) and the coordinates of

ABC is a triangle and AD is the median. If the coordinates of A are (4,7,-8) and the coordinates of centroid of triangle ABC are (1,1,1) what are the coordinates of D? (A) `((-1)/2,2,11)` (B) `((-1)/2,-2,11/2)` (C) `(-1,2,11)` (D) (-5,-11,19)`

coordinates