A A\,A is the point (5,−1)(5, -1)(5,−1) and B B\,B is the point (4,−3)(4, -3)(4,−3). Write down as a column vector AB⃗\vec{AB}AB.
C C\,C is the point (1,6)(1, 6)(1,6) and D D\,D is the point (−3,9)(-3, 9)(−3,9). Write down as a column vector CD⃗\vec{CD}CD.