The lower right one certainly does seem like a crop of the same decal as this background/"stunt" wrist communicator, using the portion from the second from the top full width "panel" downward in this image.
The upper left looks like it is a different "crop" of the same decal, only going from two "half panels" upward and over the "top" as viewed in this image of the same background/"stunt" wrist comm prop.
The black block lettering in the upper right of the PADD looks to my eyes like it reads "STC" which could be the acronym for "Starfleet Training Command" which would make sense with the scene given that Sonak was finishing up his training at Starfleet HQ according to the dialog in that scene.
I concur. It does look like the tricorder "green and red" panel section with the green portion repeated.
Alas, I don't think we have any images which show what the middle and lower left left panels look like on the PADD since Sonak's palm covers it throughout the scene.
Edit: We seem to have a slight peek at the lower left panel in a earlier shot in the scene, the first screengrab at the top of the thread.