CREATE TABLE table_28568 ("Name / Name of Act" TEXT, "Age ( s ) " TEXT, "Genre" TEXT, "Act" TEXT, "Hometown" TEXT, "Semifinal  ( Week ) " FLOAT, "Position Reached" TEXT)

what are all the hometown where the average age is 16
SELECT "Hometown" FROM table_28568 WHERE "Age(s)" = '16'
SELECT "Hometown" FROM "table_28568" WHERE "Age(s)" = '16'