Coordinate geometry question(power prep ets) Spoiler

Hey Gregmat community,
I know we are not supposed to share ets test question, but I encountered this one question that is driving me crazy in the 2nd free test, I didn’t find any question similar to this please help if u can.

I don’t know were to start.

Each square is one unit and rule of reflection in line y=x is (x,y) -->(y,x)

please elaborate clearly

Cool Got it

explain bro?

How’d you draw them lines below??