The $\text{'}\text{'}$tapedata$.$xlsx$\text{'}\text{'}$ file contains data for weeks during $20092011$ for the unit sales of $3$M tape, price charged, whether an ad campaign was run that week $(1=$ ad campaign$),$ and whether the product was displayed on the end of the aisle $(1=$ end cap$).$

First, create a pivot table that displays sales $($units$)$ aggregated across all years and months $($hint: you will need to create columns for year and month in the raw data, before you start the Pivot table. Note that the Week column gives the date in the form of$,$ form example, $2/2/09.$ That would be Feb $2,2009.$ So you can use this information to create additional columns for month and year$).$