Direct procurement and contracting for a project program

Please also cite the sources as references.

1. Briefly define procurement.

2.Briefly describe three procurement models.

3.List three benefits of planning the procurement for a program.

4. List 10 procurement processes.

5. Briefly explain what a 'contract' is.

6.Briefly define and explain the key elements of contract management.

7.Briefly explain the legal obligations of both parties in contract management.