3. (4 points) A research team conducted a survey with 130 purchasers of new BMW 3 series cars, 130 purchasers of new BMW 5 series cars, and 130 purchasers of new BMW 7 series cars. The researchers about the age of each BNW purchaser. The results are presented using a box plot. Age of BMW Purchasers BMW 3 series BMW 5 series BMW 7 series 25 30 35 40 45 50 55 60 65 70 75 80 Age in years Compare the three box plots. What do they imply about the age of purchasing a BMW from the series when compared to each other? b. Look at the BMW 5 series. Are there more data in the interval 31 to 39 or in the interval 45 to 55? Explain. c. Which group is most likely to have an outlier? Explain how you determined that. d. Estimate the interquartile range (IQR) for each BMW series. Which BMW series data set has a smaller data spread