Suppose a case-control study is performed to estimate the association, if any, between a particular blood- pressure medicine and the occurrence of a heart attack. Cases are 200 people who survived their first heart attack, which occurred recently. For each case, there is a control: a person who has not had a heart attack as of their enrollment into the study. Everyone filled out a questionnaire asking if they ever took the blood-pressure medicine in the past. The exposure is ever having taken the blood-pressure medicine. The outcome is having a heart attack. Of the 200 cases, 78 tool the blood-pressure medicine. Of the 200 controls, 136 took the blood-pressure medicine. 1) From the information above, fill in the table: Heart Attack Yes No Total Exposed Yes No Total 2) What is O, the odds of being a case among the Exposed group? E = 3) What is Ou, the odds of being a case among the Unexposed group? Ou = 4) What is the Odds Ratio? OR= 5) What does the odds ratio tell us about the association between having taken this blood-pressure medicine and chances of having a heart attack?