For Barcelona vs Inter game will not be that easy as Inter can be happy also with a draw in this game so that can make things pretty difficult.
Bayern Munich played well in the UCL but the games in their League were poor. They are in fifth place. Four games without a win. In the UCL I think Bayern Munich are the favourites to qualify for the knockout phase. Inter and Barca will probably be scrambling for second place. When compared to actually I am more sure if Barcelona win. Barcelona is pretty good in the league, while Inter is unstable. The second game certainly competed seriously for second place. The defeat to Bayern Munich is not the benchmark for Barcelona failing to qualify for the knockout Phase, there are still a few games so there are still many opportunities to have.
I won't be discussing Bayern in the domestic league in this thread but still focusing on those in the Champions League. Their strength is still too strong for Barcelona and Inter.
Currently their chance is very big if you look at the previous 2 matches plus their opponent in the third match is Plzen. But that doesn't mean it can be easy because they also have to know that underestimating the opponent sometimes isn't very good and they have to reflect on last season's defeat to the Underdogs in the knock out phase.