According to the Real Estate Center of Texas A&M, there are seven land regions in Texas. You have been provided with land values of all seven regions for past 10 years. Now, you have been provided the task of establishing long-run relationships with these price series. As a pilot study, you have picked prices from two regions, Panhandle Plains and South Texas Plains. Explain how you would investigate long-run price relationships among land values of these two regions. State the tests and explain the methods you would use to establish the co-integrating price relationships