Describe the “natural history of disease” and disease progression from its inception to its resolution.Paper , Order, or Assignment Requirements1. Managerial epidemiology is integrated through general management functions. Explain each of the management functions in terms of the managerial epidemiology, i.e., what are the: a. Planning functions, example(s)? b. Directing functions, example(s)? c. Controlling functions, example(s)? d. Organizing functions, example(s)? e. Financing function, example(s)? 2. Describe the “natural history of disease” and disease progression from its inception to its resolution. 3. What are some of the many epidemiologic contributions to quality assurance in healthcare and public health? 4. Case Study