So 6th spot, as far as I can tell, will mean we qualify automatically for the Group Stages IF Man Utd win the FA Cup.
If Palace win the FA Cup and we finish 6th, then we'll play in the third qualifying round.
And I am right in saying that if we finish 6th, Palace win the FA Cup and Liverpool finish 7th and win the Europa League, then we don't get a spot at all?