1. Create three columns in the Data worksheet that calculate sales revenue, variable cost, and contribution margin for each sales record (each row.) Use the columns already named in the Data worksheet "sales revenue," "variable cost," and "contribution margin," respectively. Format numbers in the three columns as Accounting with two decimal places. (3 marks) 2. Create a pivot table that shows sales revenue by region for each of the four years and quarters. Correct any errors in the original dataset in the worksheet that are revealed in this initial pivot table. Once you have corrected the errors in the original data set, refresh the pivot table to reflect the corrected data. Insert a pivot chart that shows the sales revenue trend by region over the four-year period. In the pivot chart, the x-axis should be years and the y-axis should be sales revenue. Answer the question 'what trends do you see in the pivot table and pivot chart?" (4 marks) 3. Create a pivot table that shows sales revenue, variable cost, and contribution margin for each year for each region. (1 mark) 4. Create a pivot table to answer the question "what was the most profitable collection within the Elements and Jeffrey Alexander brands based on Grand Total (2015-2018), as measured by contribution margin?" (3 marks) 5. Create a pivot table to answer the following questions within each brand, what was the most profitable collection in 2018, as measured by the contribution margin ratio? Are any collections unprofitable? Which one(s)?" (4 marks) Note: use the field "years" to filter the data to include just the year of 2018. You will need to add a calculated field to the pivot table to calculate the contribution margin ratio. Within each brand, sort the collections by contribution margin ratio, from the largest to the smallest. Interpret your findings. 6. Complete the worksheet named "segment margin." You will calculate each region's segment margin and operating income for 2018. (Hint: Link to the totals in the pivot table you created for Requirement 3.) You will get the fixed costs for calculating the segment margins from the "fixed cost data" worksheet. Answer the question do you think any regions should be dropped or otherwise restructured?" Explain your reasoning