Received 1099-R from Litigation with line 2a blank...

Received a 1099-R from TERRAZA V SAFEWAY ERISA LITIGATION QSF, Line 1: 444.96, 2a is BLANK, Line 2b: taxable amount not determined "checked", Line 3: blank, Line 4: 88.99, all other lines: blank.                    Question #1: Looks like payment came from a law firm... Would this be a Qualified or NonQualified Plan?  Question #2: Confused as to why Line 2a is blank, 2b shows: taxable amount not determined is checked, Line 4 shows taxes withheld: 88.99...  this looks messed up, won't this trigger an Audit if I report it as shown?