SPRINGFIELD — A three-judge federal court panel in Chicago will begin hearing oral arguments Tuesday in three cases that could determine the makeup of state legislative maps in the Chicago area and Metro East region for the next 10 years.The panel announced during a status hearing Friday that it will go ahead with in-person oral arguments, even though two sets of plaintiffs had said earlier in the week that the case could be decided solely on the briefs and written testimony that have already been filed.Democrats in the …