Suppose we would like to create a 95% confidence interval for the average monthly revenue (in dollars) based on advertising budget, segment, location, and season? What function(s) in R would we use to calculate this confidence interval? Question 19 options: Create a model using the lm() command, and then use the predict() command. Use the prop.test() command. Create a model using the lm() command, and then use the summary() command