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porno) In R [ datarium package], the marketing dataset contains the impact of the amount of money spent on three advertising medias (youtube, facebook and newspaper) on sales. We want to build a model for estimating sales (y) based on the advertising budget invested in youtube (x1), facebook (x2) and newspaper (x3). Use the output provided to answer the questions below. After some trial and error, the following model was fit: s model model2 summary(model2) Call: Im(formula = sales ~ youtube + facebook + youtube: facebook, data = marketing) Residuals : Min 10 Median 3Q Max -7.6039 -0.4833 0.2197 0.7137 1.8295 Coefficients: Estimate Std. Error t value Pr(>Itl) (Intercept) 8. 100e+00 2.974e-01 27.233