a. Discuss the historical significance of public health, its beginnings, and where it is today. Why was public health originated, and how does this origin relate. to the three core functions guiding public health practice today? b. Research as many roles and settings as you can identify of the public health nurse today. Why was public health roles/settings should be identified? Briefly explain what they would do in this role. c. Based in your assigned readings, compare and contrast past public health issues with present public health issues. Specifically, discuss the similarities and differences which are evident.