I need help with the following statements and questions that need responses for my introduction to public administration. please help?

1. A description and explanation of public administration as grounded to the U.S. Constitution (Preamble, Article, and Amendments). 2. A description and explanation of the role of public administrations/bureaucrats (and the department/agency/corporation) they operate within. 3. A description and explanation of the approaches to public administrations.