NOTE: If you do not have the Data Analysis option under Tools you must install it. You need to go to Tools select Add-ins and then choose the 2 data toolpak options. It should take about a minute. b. Assuming there is a statistically significant relationship use the least squares method to find the regression equation to predict the advertising costs based on the number of orders received. Please use the regression procedure within Excel under Tools > Data Analysis to construct this equation. c. Interpret the meaning of the slope b1 in the regression equation. d. Predict the monthly advertising cost when the number of orders is 1800000. (Hint: Be very careful with assigning the dependent variable for this problem)f. Compute the standard error of estimate and interpret its meaning. g. Do you think that the company should use these results from the regression to base any corporate decisions on?.explain fully.