Table: manu_0809_games_2
Columns: date
opponents
h_a
result_f_a
attendance
league_position

Question: What was the Result F–A on 21 February 2009, when the league position was 1st?
SQL: SELECT "result_f_a" FROM manu_0809_games_2 WHERE "league_position" = '1st' AND "date" = '21 february 2009'