A Bloomberg BusinessWeek North American subscriber study collected data from a sample of 2861 subscribers. Fifty-nine percent of the respondents indicated an annual income of $75,000 or more, and 50% reported having an American Express credit card.1. What is the population of interest in this study?2. Is annual income a qualitative or quantitative variable?3. Is ownership of an American Express card a qualitative or quantitative variable?4. Does this study involve cross-sectional or time series data?5. Determine whether the following two statistical inferences may be made based on the sample data collected. An estimated 59% of the population of subscribers has an annual income of $75,000 or more. An estimated 60% of the population of subscribers has an American Express credit card.