Consider the two variables Age and Income

(a) (2 points) Produce a histogram for each of these variables (these are marginal dis- tributions). Label appropriately and note any distinguishing features revealed in each.

(b) (3 points) Use a scatter-plot to examine the relationship between these two vari- ables, label appropriately, describe what you observe, and report the correlation coefficient for this data.

(c) (2 points (bonus)) Offer an augmentation of the scatterplot to help determine if the relationship between these two variables differs by level of the factor Sex.