The Developers find out, that they will not be able to finish all Sprint Backlog items. In this case the Sprint Scope can be re-negotiated between the Product Owner and Development Team.

When n Scrum teams are working on a product, there should always be only 1 Product Owner but 1-n Scrum Masters.

The Sprint Planning is timeboxed to a maximum of eight hours for a one-month Sprint. For shorter Sprints, the event is usually shorter.

When multiple teams are working on the same product, their Sprints must start and end at the same time.

What is the reason for the fact, that the Scrum Master has to attend the Daily Scrum?