Find the Missing Coordinate

Question 1:

A is the coordinate (-2,0). If the midpoint of A and B is (-1,-2), find B.
(0,-4)

Question 2:

A is the coordinate (3,-7). If the midpoint of A and B is (3.5,-0.5), find B.
(4,6)

Question 3:

A is the coordinate (-8,-4). If the midpoint of A and B is (-5.5,-1), find B.
(-3,2)

Question 4:

A is the coordinate (10,0). If the midpoint of A and B is (5,-4), find B.
(0,-8)

Question 5:

A is the coordinate (2,-10) and B is (-1,-1), find the midpoint.
(0.5,-5.5)

Question 6:

A is the coordinate (5,-1) and B is (-3,3), find the midpoint.
(1,1)