here is what i have:
SELECT TestTbl.Rg2, Min(TestTbl.Ltnum) AS MinOfLtnum, Max(TestTbl.Ltnum) AS MaxOfLtnum1, (SELECT TOP 1 T1.RG1 FROM TestTbl AS T1 WHERE T1.Rg2=TestTbl.Rg2 ORDER BY T1.ID DESC, T1.LTNUM DESC) AS Max2
FROM TestTbl
GROUP BY TestTbl.Rg2;