Find the Missing Coordinate

Question 1:

A is the coordinate (-9,8) and B is (1,-7), find the midpoint.
(-4,0.5)

Question 2:

A is the coordinate (-9,-7). If the midpoint of A and B is (-0.5,1), find B.
(8,9)

Question 3:

A is the coordinate (6,-10). If the midpoint of A and B is (0.5,-5.5), find B.
(-5,-1)

Question 4:

A is the coordinate (-3,1) and B is (3,-2), find the midpoint.
(0,-0.5)

Question 5:

A is the coordinate (4,-10). If the midpoint of A and B is (4.5,-7.5), find B.
(5,-5)

Question 6:

A is the coordinate (-6,5) and B is (9,-10), find the midpoint.
(1.5,-2.5)