When's kickoff? Who's singing the national anthem? And how does one make Super Bowl snacks in the shape of the Super Bowl? As the Baltimore Ravens make their 10th Bowl visit, facing the 49ers, who wouldn't mind tying the record for most Super Bowl wins, people have been asking lots of questions -- and looking for answers online -- about XLVII. Here's a gander at gridiron questions blitzing Yahoo! Search in the past week. -- By Vera Chan, Yahoo!