13. Each of the following tables of means shows the results of a study using a factorial design. Assuming that any differences are statistically significant, for each table

(a) and (b), make two bar graphs showing the results (in one graph grouping the bars according to one variable and in the other graph grouping the bars according to the other variable);

(c) indicate which effects (main and interaction), if any, are found; and

(d) describe the meaning of the pattern of means (that is, any main or interaction effects or the lack thereof) in words.
(i) Measured variable: Right frontal neural activity in brain during memory task