Among the nine (9) project management functions from the Project Management Body of Knowledge (PMBOK) for the Pennsylvania Project Management Professional (PMP) certification, which four (4) functions will you choose as the most essential to apply to the DP Architect’s project above? Describe each of these 4 PM concepts and thoroughly explain why you think they are the most important from among the 9 PMP function concepts that should be applied in this project. Be sure to provide the proper citations and references from various online and offline sources for ideas you would read or view to support your discussion.