State whether each of the following is an example of a between-subjects, mixed, or within-subjects two-way ANOVA design.
(a) A psychologist administers a small, medium, or large dose of a drug to a sample of mice (Factor A: drug dose) and measures reward-seeking behavior across three experimental trials (Factor B: trials).
(b) An industrial organizational psychologist measures the GPA among men and women graduate students (Factor A: sex) with low, medium, or high leadership potential (Factor B: leadership potential).
(c) A behavioral psychologist asks the same group of participants to rate the effectiveness of each of three marketing commercials (Factor A: commercials) for each of two products (Factor B: products).