(Dataset: world. Variables: free_overall, gdp_cap3.) In this exercise, you will use multiple regression with dummy variables to analyze the relationship between economic development and economic freedom. The world.dta dataset contains free_overall, an interval-level measure of freedom that ranges from 0 (least free) to 100 (most free). The dataset also contains gdp_cap3, a three-category ordinal measure of per capita GDP, an indicator of economic development. The gdp_cap3 variable is coded 1 for low-GDP countries, 2 for middle-GDP countries, and 3 for high-GDP countries