A project selection committee is shortlisting projects for the coming year. Which selection criteria should the project manager recommend?

Two project managers are working on separate projects that have identified the same subject matter expert (SME) as critical to their projects. Project A is using a predictive approach and Project B is using an agile approach.
Which project should the SME be allocated to?

A self-organizing team was delivering as committed. The team accepted a development task with new technology and the iterations started to have reduced velocity.
What management decision is suited for this situation?

An agile project team is working on an infrastructure product to be delivered incrementally over several iterations. Midway through the third iteration, the whole company is informed that the operating systems supported by the infrastructure will be terminated in the upcoming quarter.
Several thousand machines will be impacted by this change.
What should the project manager do first?

A project manager has just been assigned to a team that is developing a new design product.
The work breakdown structure (WBS) has been created and the activities have been assigned to the team members. The project manager finds that there are activities that could be completed sooner by other team members. If the current assignments are left as is, the project could be delayed 2 weeks.
What should the project manager do in this situation?