Explain how this experiment could be modified using a Solomon four-group.

In 2013, the Supreme Court of Pakistan struck down several key provisions of the Voting Rights Act of 1973. The Voting Rights Act of 1973 is generally considered to have been instrumental in ending most forms of gender discrimination in voting, especially in the northern province. Illustrate how you would employ a time series design to study the impact of the Voting Rights Act on rates of women voter registration in the north of Pakistan. In designing your study, address the following questions:
1- What is your unit of analysis?
2- What is your dependent variable?
3- At what time intervals would you measure the dependent variable?
4- What potential threats to interval validity would you anticipate?
5- How could your study be improved by employing any other design?