Answer:
Step-by-step explanation:
One way you could do this is to put a vertical line at x = 6. Let that line have the properties of a mirror. Enlarge this and check out the lowest point which is at x = 2 y = 4,5
The same point for B is at x = 10 and y = 4.5
The x value in both cases is 4 units from the reflective line.
