A psychologist conducts a two-factor study comparing the effectiveness of two different therapy techniques (factor A) for treating mild and severe phobias (factor B). The dependent variable is a measure of fear for each participant. If the study uses n= 10 participants in each of the four conditions, then identify the df values for each of the three F-Ratios. Be sure to show all formulas with symbols (and plug in numbers), steps, processes and calculations for all parts of the answers.