3-13.Toys "R" Us, Inc., is the leading store for children's toys and other play material. The company's financial officer is determining the previous month's sales revenues. The following data are a selection of 30 outlets' sales revenue (in $ thousands) record: a)Compute the mean, median, and mode for these data. b)Based on the result of part a, indicate whether the shape of the distribution is symmetric or skewed. c)Construct a box and whisker plot for the sample data. Compare it with your answer to part b. Discuss your findings.