Carefully read "Cross-Age peer tutoring and fluency-based instruction to achieve fluency with mathematics computation skills: A randomized controlled trial" from The Journal of Behavioral Education by Greene et al. Then, provide succinct answers to the following questions. 1. What was/were the research questions(s) (inferred from the purpose stated)? 2. Identify the independent variable(s). 3. Identify the dependent variable(s). 4. Describe how the data were analyzed. 5. What were the major finding(s)? 6. What were the limitations that the authors described in the study?