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Hi guys, I have been stuck on a question for a number of hours.... the question comes with the following data set on a shops advertising spending, this is the data set: Sales DirectNewspaperTelevision 15.98 1.05 1.35 1.55 21.59 1.29 2.25 1.97 25.47 0.96 1.79 1.64 16.02 1.51 1.73...