Copy and paste the following questions into a Word Document and include your answers beneath the question. Save your document as your last name_Assignment_2 and submit through this link. Each question is worth 10 pts and will be graded based on the attached rubric. Write concisely and completely. Most information should be taken from your text. You may use outside sources but you must cite and reference any that you use. All formatting should follow APA format. Assignment #2 1) Define and describe the formulas for period prevalence rate and incidence rate. What do these rates tell an epidemiologist about a disease?2) Identify a disease has a high prevalence rate but a low incidence rate and a disease that has a high incidence rate but a low prevalance rate. What characteristic about these diseases creates this interrelationship?3) Define and give the formula for an odds ratio.4) Complete the 2 x 2 table below and calculate the Odds Ratio: There were 120 total with lung cancer of which 20 were not exposed to tobacco smoke; 250 total without lung cancer of which 75 were exposed to tobacco smoke. Show your work.Disease StatusYes No Exposure Status YesNoOdds Ratio = 5) Interpret the odds ratio / what does this finding mean? __________________________________________________________________________________________________________________________________________________Required Course Textbook:Friis, Robert H., and Thomas A. Sellers. (2014) Epidemiology for public health practice, 5th ed. Sudbury, MA: Jones and Bartlett Publishers.