Watford has problems about goal positions. Their goal number is only 1 in their 4 last matches. They have bad form. On the other hand, Manchester City has good form. Then Manchester City don't live problems against who has bad attacking form. So Manchester City win and 4,5 under is the best option. Because I think that Watford won't throw a goal and Manchester City won't try to throw 4+ goals in this mix fixture.