Just how well can Mayweather jr. avoid all the punches of Pacquiao?

You should know that Mayweather is prone to straight punches, But you should also know that for a smaller boxer it is harder to trow straight punches at a taller bigger boxer. So Maywether just moves his back foot and pick his front shoulder, it would not matter how strong, quick or unpredictable Pac is Pac will not be able to land.