A project manager is managing an internal project with a tight budget and schedule. While executing the project, the project manager realizes that some stakeholders are working against the success targets of the project.
What should the project manager do to ensure successful project delivery? (Choose two)

A project manager has experience working with a specific provider that has been requested for an upcoming project. This provider often fails to meet deliverable dates; however, it is the only company with the specific experience required for the project.
What should the project manager do during the planning phase?

A project using a hybrid approach to migrate from a current system to a new and enhanced system is underway. The plan is to migrate the system in stages. However, the operations team is complaining that they are not ready to start supporting the new system.
How should the project manager effectively approach this situation?

One of the stakeholders on the project led a change request a month back. He reached out to the project manager stating that he has not received any response yet. How can this situation be resolved?

After the project charter's approval the project manager needs to work on detailed project requirements, constraints and assumptions with stakeholders However, not all of the stakeholders are immediately available for a meeting in the short term.
What should the project manager do in order to gather the information needed from stakeholders?