1. Using the Tissue.xlsx Download Tissue.xlsx data file, and assuming that each type of toilet tissue should be assigned to one of the following brands: Charmin, Dominick's, Kleenex, Northern, Scott, answer the following questions: a. What is the average profit per case sold at each of the stores in the data set? b. Which brand (Charmin, Dominick's, Kleenex, Northern, Scott) is the market leader based on total number of packages sold? How many packages did this brand sell? c. Which brand is the market leader based on total revenue? What is the total revenue for this brand? d. Look more carefully at total sales of Scott brand tissue by week. Do you see anything that would cause you concern in thinking that there might be additional data errors? If so, what would cause you concern?