Which command staff member serves as the incident command’s point of contact for organizations not included in the incident command or unified command?

Bonus question: according to wikipedia, in chinese philosophy yin and yang "describes how seemingly opposite or contrary forces may actually be complementary, interconnected, and interdependent." what are some examples from the story that amy tan may have intentionally incorporated elements of yin and yang philosophy into this story? select 2.

What percentage of people are left handed?

How has congress added to the president’s role as chief economic planner over the years?