I've explained here pretty well what one or another does, yet you decide to continue the argument:
Here you are just being annoying and repeating yourself. Your question(s) were pretty much answered in my first reply. In your last post you are really nitpicking little details, you were asking in your initial post 'what do they do' - And that was explained multiple times. I assumed you knew what key was, hence I didn't explained those keys in particular, only what 'FPS/reaction' speed does for you. This particular post also shows that you do know what each key does, so your question has been answered multiple times.