The First and Second Year boys achieved an extremely rare feat by capturing both the Minor & Junior South Dublin Basketball Championships yesterday in Newpark Comprehensive.    Both teams had been beaten by their opponents earlier in the year and overcame the odds to reach success.  The First Years beat Presentation College Bray 36-35 while the Second Year Boys beat host Newpark 36-31.  The 'Most Valuable Players' were Binyam Keegan for the Minors and Lawrence Proseckin for the Juniors.