If Leipzig lives up their full potential in the last group stage game against Shakhtar Donetsk, I believe they should be able to at least tie the game and advance to the next round. On paper they are the better team, but of course anything can happen during a single game especially when it is all or nothing and has some final game character. It is also dangerous to just play for the draw. One unlucky situation is enough during the later stage of the game and you lose it all. That's why that game will be an interesting one to watch even though those aren't the biggest names.
Yes. Of course RB Leipzig must be able to get a win against Shakhtar Donetsk, or a draw. But after we saw last night's match, of course we have the belief that the RB Leipzig players are capable of doing their best. But this is just a game, no one can predict with certainty. Sometimes the relegation club beats the club that is in first place.