Sorry I just singed up today and can't help you with the form. I also can't help you with your first question as I am a retired aerospace test engineer with a BS degree in physics.
I was reading a recent physics article on the google home page that stated that the current theory of mass is that it is a photon moving at light speed but stationary in space. My analogy of this was like a photon moving in a circle but it is not moving. I wish I could sight the article but...