What component of the project scope definition defines project exclusions?

In which of the following project management process group can stakeholders be identified?

During which process would stakeholders provide formal acceptance of the completed project scope?

You are in the process of directing the performance of the planed project activities and managing the various technical and organizational interfaces that exist within your project. All the
following are actions that you should perform in this stage except:

The construction engineer is doing questionable work on his activities on the remodeling project. The Project Manager has spoken to him about it a few times to no resolution. Functional management has been made aware of this issue as well. Who is responsible for the quality of the work of the construction engineer?