2. Which correlation? State which correlation coefficient (Pearson, Spearman, point-biserial, or phi) should be used to study each of the following factors. a. Activity (active, inactive) and depression (depressed, no depressed) b. Time spent at school and time spent studying in hours per week c. Veteran (yes, no) and level of patriotism indicated on a scale d. The hierarchical ranking of a litter of mice for play and social behavior e. A researcher measures the relationship between political affiliation (republican, democrat) and attitudes towards gun control, using a rating scale. f. A physician measures the relationship between labor pains and infant bonding. The data consists of the ranks for each mother based on the amount of pain she experienced during labor (from lowest to highest) and the amount of time she spend bonding with her infant following birth (from least to most)