A sample of 25 undergraduates reported the following dollar amounts of entertainment expenses last year: Click here for the Excel Data File a. Find the mean, median, and mode of this information. (Round the "Median" to whole numbers and the "Mean" to 2 decimal places.) b. What are the range and standard deviation? (Round the "Range" to whole numbers and the "Mean" to 2 decimal places.) c. Use the Empirical Rule to establish an interval which includes about 95 percent of the observations. (Round your answers to 2 decimal places.)