A globally distributed project team is running behind schedule due to the lack of team commitment and low morale. In order to bring the schedule back on track, what should the project manager do first?

A project manager is using a subcontractor for mobile application development. When the project team tests the application, they realize it does not comply with the new company user-interface standards. Even though these new standards were not included in the statement of work (SOW), the subcontractor agrees to the additional scope as long as payment for this additional work is paid immediately.
What should the project manager do?

A project manager has been moved to a new division and is in charge of an existing project in an unfamiliar domain When attempting to gain an understanding of the risks for this agile project what is the primary tool the project manager should employ?

During the execution of a hybrid project, one developer had to be replaced. The new resource is extremely competent in quality assurance tasks, but does not have much experience in development.
What should the project manager do?

A project manager is made aware that there are defects in the parts provided by a supplier, which are causing delays in the testing phase. The supplier claims that all parts have been delivered as per the contract. If the defects are not fixed by the supplier within one week, the product release will be impacted.
What should the project manager do?