CREATE TABLE table_77632 ("YEAR" FLOAT, "Seniors" TEXT, "Reserves" TEXT, "Thirds  ( Under 17's ) " TEXT, "Fourths  ( Under 14's ) " TEXT)

Which Fourths (Under 14's) have Seniors of dederang mt beauty?
SELECT "Fourths (Under 14's)" FROM table_77632 WHERE "Seniors" = 'dederang mt beauty'
SELECT "Fourths (Under 14's)" FROM "table_77632" WHERE "Seniors" = 'dederang mt beauty'