6. Study 1: We wish to investigate if a new medicine is effective in reducing the length and severity of the flu. We take the next 20 patients who come to the walk- in clinic complaining of flu and, after a medical exam to verify that the patient has the flu, give them the new medicine and tell them about the new drug we are giving them. One week later, the patients are contacted and 15 patients state the new remedy was helpful in reducing the severity and length of the flu. Is this an experimental study or observational study? If experimental, what are the treatment(s) and variable(s) of interest? f observational, what is the variable(s) of interest? at kind of sampling method is being used in the study