This is really important game for us as it is our last "easy game". Watford is winnable and we can surprise Everton and ManU, but Arsenal probably rip new one for us at their home now that they are out of champion race.
Sunderland has similar hard fixture list for the rest of season, only Watford being easier game and few odd points possible. So with 7 point lead I think it would be too much for them. I think we could keep them behind with draw too, but if we lose to them that would in my eyes mean relegation. They have played so many draws lately that they can pull few more and we are behind in goal difference by one goal. Ofc goal difference can change and as said we can pull few surprises against top table team and win Watford, but we haven't been that good when the pressure has been on our players.
But I am more concerned about Newcastle, they have AV, CP and Swansea left and if we lose and they win in next round, they would be only 3 points away and they should get quite easily 4 points from CP and AV who are both probably either safe or down at point where they face eachother.
As said we all are nervous (at least those who really support Norwich, what a thriller this end season has been), but everything is in our own hands. Get point or three from Sunderland and 2-3 points more from rest of games and we are surely staying up. Famous last words.