When is a Salience Model used?

Which of the following must not performed in the project initiation process?

A project manager is managing a project which is approaching the end of the execution phase. A high-level stakeholder informs the project manager that a very important requirement was not included in the scope of the project, and that without that requirement the project will deliver no value.
What is the first thing the project manager should do"?

A project is scheduled to end in 2 weeks. The team is expected to continue working long hours and is showing signs of weariness and fatigue What should the project manager do to encourage the team?

Obtaining team commitment depends on: