I have a big prejudice against Arsenal so I wouldn't place a money bet. The odds don't look that attractive and Arsenal look so unreliable.
Regarding the second game, all outcomes look attractive

Good risk and good reward, either team can win. A draw is also possible, I expect Nottingham to keep the game dry, so something like 0-0 is very likely (although I'm sure the bookies are quoting BTTS Yes as clear favourites).
That's the same for me because in the current conditions taking some bets on Arsenal is a bit of a risk so it's better to hold off.
For other games like Manchester United it's the same because the performance of this team when facing a much more balanced team is difficult to predict and there is probably a lot more potential for a draw.
For the current position I won't bet because it's difficult to make predictions because both teams playing will try to do their best so it's difficult to predict.