What is the difference between a group at risk for poor health and a group considered a vulnerable population?

What is the difference between a group at risk for poor health and a group considered a vulnerable population? Provide an example of a group at risk and a group considered a vulnerable population.
2) Explain why members of these groups cannot advocate for themselves. Why advocating for these groups would be beneficial?What would you advocate for?
3) How can community health nurses apply the strategies of cultural competence to their practice? Provide at least one example from each of the following four strategies: cultural preservation cultural accommodation cultural re- patterning and cultural brokering.
4)What is a possible barrier to applying the strategy/example chosen?
Please read Community/Public Health Nursing Practice: Health for Families and Populations (Textbook)
Read chapters 10 17 18 20 and 21 for guidelines.
Prepare this assignment according to the APA guidelines found in the APA Style Guide. An abstract is not required.
In-text citation and minimum of 3 references required.