These sentences were correct in my grammar book, but I do not know what the difference is?<br/><br/>1. Only a few members were able to attend the convention: Henry, Karen, David, Mark, and Susan.<br/><br/>2. The art students were expected to supply the following: brushes, paints, paletts and pads.<br/><br/>Why was a comma not put after paletts?<br/><br/>Thanks