1. one of the main differences in JPEG and RAW is the size difference or the quality of the picture.
  2. A RAW file is bigger
  3. yes you can, you go into “choose files” button and choose a raw file and click “JPEG convert”
  4. I would shoot on JPEG because the client would want a lot of pictures and it would save me tons of money on memory card and it would be only a slight difference in quality.