Which of the following is a key input to define activities?

A project manager is scheduled to meet with a client for their weekly risk management meeting. The project manager observed that one of the tasks which had external dependencies is delayed by one week. The project manager knows this will have an impact but does not know the exact details.
What two things should the project manager do? (Choose two)

A project requires a component with well-understood specifications. Performance targets are established at the outset, and the final contract price is determined after completion of all work based on the seller's performance.
The most appropriate agreement with the supplier is:

All of the following statements are true regarding the request seller responses process EXCEPT:

An agile project has a documented list or requirements prioritized in high, medium, and low categories. The project team has expressed that it is difficult to know what to work on next as so many items are listed as high priority.
What should the project manager recommend?