Answer:
(Explained+) 3. H(0,5) I(-5, -4) ((i would think so)) 4. Q(4, -1) S(2, -3)
Explanation:
Simple ver: try counting over the same distance from the other points to then shape it on the other side (y axis). For the x axis, turn your head and make it look symetrical. To the other triangle.
As for the cordinates, split it into the 4 quadrants(squares) and keep track of if x or y turns negative or positive. I'd suggest writing it with each transition until you have your final answer if you are unsure.