Dixie showtime movie theaters, inc., owns and operates a chain of cinemas in several markets in the southern united states. the owners would like to estimate weekly gross revenue as a function of advertising expenditures. data for a sample of eight markets for a recent week follow: a. develop an estimated regression equation with the amount of television advertising as the independent variable. test for a significant relationship between television ad- vertising and weekly gross revenue at the 0.05 level of significance. what is the inter- pretation of this relationship? b. how much of the variation in the sample values of weekly gross revenue does the model in part a explain? c. develop an estimated regression equation with both television advertising and news- paper advertising as the independent variables. is the overall regression statistically significant at the 0.05 level of significance? if so, then test whether each of the regres- sion parameters b0, b1, and b2 is equal to zero at a 0.05 level of significance. what are the correct interpretations of the estimated regression parameters? are these interpre- tations reasonable? d. how much of the variation in the sample values of weekly gross revenue does the model in part c explain? e. given the results in parts a and c, what should your next step be? explain. f. what are the managerial implications of these results?