Problems: 1. This Gallup Poll article describes a poll regarding attitudes towards capitalism and socialism among adult Americans. Read the first five paragraphs (until the section \"Fewer Than Half of Young Americans View Capitalism Positively\") and the Survey Methods in the grey box at the bottom of the article. 1. What are the response variables? 2. What is the explanatory variable? 3. What is the population of interest for this poll? 4. What is the sample size for this poll? 5. Was this a voluntary response sample? 6. Do you think that there was any undercoverage for this poll? 7. Describe nonresponse in this poll. How would you overcome nonresponse for this poll