The goal of this project is to analyze a challenging dataset to practice multiple linear regression model building. In particular, you are to follow the directions in the questions to build a regression model for predicting the response variable, Y, from five potential quantitative predictor variables, X1-X5, and one potential categorical predictor variable, Region (with levels East, South, and West). The project.csv data file contains two indicator variables to code the information in Region: DS = 1 for South, 0 otherwise, and DW = 1 for West, 0 otherwise. Thus, the East region is the reference level with 0 for both DS and DW