For the study below: a) identify the independent (IV) and dependent (DV) variables, b) decide whether the study should use a between-subjects or within-subjects design, and c) indicate whether you would use equivalent groups or counterbalancing to manage any control issues. "A psychologist interested in mazes wants to learn whether learning is faster when the maze is run 10 times in one day, once a day for ten 10 days, or twice a day for five days