Which is a purpose of the Starting up a Project process?

Identify the missing words in the following sentence.
The 'directing a project' process starts when [ ? ] and is triggered by the request to initiate a project.

From whom does a Team Manager obtain approval for a completed product?

Which of the following are objectives of the Directing a Project process?
1 . Ensure corporate or programme management has an interface to a project
2 . Ensure that work on products allocated to a team is authorized
3 . Ensure there is authority to initiate a project
4 . Ensure that a project remains viable

Why is the 'learn from experience' principle applied to a project?