Illinois regulators say historic Mercy Hospital on the Near South Side can be sold to a Michigan health care provider. Now comes the hard part: resuscitating a hospital that filed for bankruptcy protection last month and has been cutting employees and closing services. “This hospital is on life support,” Mercy physician Dr. Yousuf Sayeed said during the nearly five-hour-long board meeting. “Just walk the halls and you’ll see it.” Here are some key takeaways.