As an analytics developer, you need to calculate weekly sales using SAS PROCEDURES. You are generating descriptive statistics for the store sales. It will help store manager to display popular items in the store entrance. Using the Train.csv file or any other file, complete the following: Step 1: Include PROC MEANS in your SAS script and calculate descriptive statistics that represents weekly sales for a certain department in a given store in a given week. Step 2: Use title and footnotes to output. Step 3: Use the label for each output column