Can the comma be dropped after "etc.", <br/>"and so forth", " and so on" and "and the like" below? Thank you.<br/><br/>v Pencils, protractors, glue, etc., are needed for the fifth-grade project.<br/><br/>v Pencils, protractors, glue, and so forth, are needed for the fifth-grade project.<br/><br/>v Pencils, protractors, glue, and so on, are needed for the fifth-grade project.<br/><br/>v Pencils, protractors, glue, and the like, are needed for the fifth-grade project.