The accompanying data file shows the annual expenditures (In \$) for 100 Amazon Prime customers. Click here for the Excel Data File a-1. Calculate the mean. Note: Round final answer to the nearest whole number. a-2 Calculate the median. Note: Round final answer to the nearest whole number. b-1. Calculate the first quartle for annual expenditures. Note: Round final answer to the nearest whole number. If you are using Excel, use the PERCENTILE.INC function to find the approprlate quartile. First quartile b-2. Interpret the first quartle for annual expenditures. Seventy-five percent of the customers spent less than $1,078,25% of the customers spent more than $1,078. Seventy-five percent of the customers spent less than $1,338,25% of the customers spent more than $1,338. Twenty-five percent of the customers spent less than $1,078,75% of the customers spent more than $1,078. Twenty-five percent of the customers spent less than 1,338,75% of the customers spent more than 1,338 . b-3. Calculate the third quartle for annual expenditures. Note: Round final answer to the nearest whole number. If you are using Excel, use the PERCENTILE.INC function to find the approprlate quartile. b-4. Interpret the third quartle for annual expenditures. Seventy-five percent of the customers spent less than $1,588,25% of the customers spent more than $1,588. Seventy-five percent of the customers spent less than $1,311,25% of the customers spent more than $1,31. Twenty-five percent of the customers spent less than $1,588,75% of the customers spent more than $1,588. Twenty-five percent of the customers spent less than 1,311,75% of the customers spent more than 1,311