Can you please help? 1) How does a quasi-experimental variable differ from an experimental variable? Can you help me provide a brief example of both. 2) what is one advantage and one disadvantage of including a quasi-independent variable in a study? 3) What are the defining characteristics of the time series design and the interrupted time series design and what is an example of a topic that would be appropriate to study using the interrupted time series design. 4) What is a pretest-posttest design and when would this sort of design be applicable? 5) what is one potential problem that could occur while utilizing a pretest and how could that problem be remedied? 6) What are the characteristics of a cross-sectional developmental design? 7) what is one advantage and one disadvantage of a cross-sectional design? 8) What are the characteristics of a longitudinal developmental design? 9) what is an advantage and one disadvantage of a longitudinal design? 10) What are the characteristics of a cohort-sequential developmental design