Find the Missing Coordinate

Question 1:

A is the coordinate (-2,4) and B is (-1,10), find the midpoint.
(-1.5,7)

Question 2:

A is the coordinate (8,1) and B is (-1,-4), find the midpoint.
(3.5,-1.5)

Question 3:

A is the coordinate (6,2) and B is (2,-9), find the midpoint.
(4,-3.5)

Question 4:

A is the coordinate (-9,-5). If the midpoint of A and B is (-5.5,-7), find B.
(-2,-9)

Question 5:

A is the coordinate (-4,4). If the midpoint of A and B is (-2.5,1), find B.
(-1,-2)

Question 6:

A is the coordinate (-9,-1). If the midpoint of A and B is (-0.5,1), find B.
(8,3)