I don't know how possible this will become looking at the current performance of Manchester United, they managed to defeat Rangers in their last Europa League match their performance doesn't look like they want to win any trophy this season so I don't seeing them getting to the Europa League semi finals I don't see that happening with this poor performance. Working harder to achieve a good result is possible but winning big teams there should be some level of seriousness and improvement in the team and if you look at the performance of the team they have got some unserious players who need to step up their game play so they their fans will keep supporting them to victory.
I couldn't believe that Manchester United was able to defeat Rangers despite their bad performance. Manchester United did not perform as a team that was serious about finishing the season with a trophy, but they were lucky to win the game. Manchester United is very poor; otherwise, a team from a small club cannot go to Old Trafford and dominate Manchester United as Rangers did. If it hadn't been for Rangers' goalkeeper, who made a mistake in 52 minutes of the game, I doubt Manchester United would have won the game because if Rangers had gotten the lead in 88 minutes, they would have used the remaining minutes of the game to maintain their lead.
However, football can be unexpected, we can't say that Manchester United is performing badly right now and will fail to make it to the Europa League final. Haven't you seen a team selected as the best loser in a group stage go ahead to win a tournament? Manchester United can go to the final and win the title, however, we do not know what the management may do during this transfer window to bring in additional players to improve their performance. Remember that Manchester United is one of the unbeaten teams in Europa.