4. Consider the variable of corn being harvested and the control of mycotoxins. Without actually examining any data - a. Provide a brief description of the variable b. Is the variable: a) cross-sectional (recorded across units during the same time period) or b) time series (recorded for the same unit over different time periods - hourly, monthly, annually, etc). c. What do you expect (again, without actually examining any data) to be the mean of the variable, and its minimum and maximum values