Which of the following is an input to Cost Estimating?

The work that must be done in order to deliver a product with the specified features and functions included in the __________?

You want to structure your project so that each project team member has a discrete work package to perform.
The work package is a______________

The milestone list is an input to which process from the Planning Process Group?

A project manager in a matrix organization has been assigned to a system solution project with tight time lines.
There are two resources assigned as part of the solution
team: one who is experienced and one who is new. During development, the project manager notices that the resources disagree on the solution approach.
What should the project manager do next to deliver a reliable solution?