Question: Who was the U21 Mens winner when Mike Marsden was the mixed restricted winner and Claire Nelson was the U21 Womens winner? 
SQL: SELECT "U21 Mens" FROM "1-28211674-3" WHERE "Mixed Restricted" = 'Mike Marsden' AND "U21 Womens" = 'Claire Nelson';

Question: When Naomi Owen won the Womens Singles and Ricardo Walther won the Mens Singles, who won the mixed veteran?
SQL: SELECT "Mixed Veteran" FROM "1-28211674-3" WHERE "Womens Singles" = 'Naomi Owen' AND "Mens singles" = 'Ricardo Walther';

Question: Who won the mixed restricted when Tomasz Rzeszotko won the mixed veteran and Karina Le Fevre won the U21 womens?
SQL: SELECT "Mixed Restricted" FROM "1-28211674-3" WHERE "Mixed Veteran" = 'Tomasz Rzeszotko' AND "U21 Womens" = 'Karina Le Fevre';

Question: When and where did Eddie Smith win the mixed veteran?
SQL: SELECT COUNT("Date/Location") FROM "1-28211674-3" WHERE "Mixed Veteran" = 'Eddie Smith';

Question: When Matt Ware won the mens singles, who won the mixed restricted?
SQL: SELECT "Mixed Restricted" FROM "1-28211674-3" WHERE "Mens singles" = 'Matt Ware';

Question: When Paul Whiting won the mixed veteran, who won the mixed restricted?
SQL: SELECT "Mixed Restricted" FROM "1-28211674-3" WHERE "Mixed Veteran" = 'Paul Whiting';