Answer: A'=(1, 3); B'=(-3, 4);C'=(3, 0); D'=(-2, 5)
You can check the PNG attached as well.
Explanation:
You need to represent the symmetry of every given points respet to the line

In that case, the line beeing paralell to the x- axis, x- value of the symmetry is the same of the given point and y = 2 is the middle between both points.
Point A(1, 1)

Point B(-3, 0)

Point C(3, 4)

Point D(-2, -1)
