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Consider the ElantraSales data for the analysis. The Elantra industry wanted to predict the future sales based on past historical data. Apply the linear regression algorithm on the given data and come up with R-Square value. Also, mention which variable is most significant in predicting the sales by finding the variable with lowest p-value. Highlight your answers with yellow color in excel sheet.

Please give a step-by-step if you can I am truly confused