How do I go about solving the problem?

Answer:
See below.
Step-by-step explanation:
You have already drawn the line x = -1 . This is the vertical line passing through the point F.
So if we reflect across this line, F will stay where it is at (-1,-1) (because F is on the 'mirror'). E is 3 units in front of the line so is reflected 3 units the other side.
The image of E, E' will be at (2, -3). The image of G, G' will be at (-2,-3).
Answer:
The image of G, G' will be at (-2,-3).
Step-by-step explanation:
if you look closely it is basic math!