The Drucker Institute ranks corporations for managerial effectiveness based on a composite score derived from the following five factors: customer satisfaction, employee engagement and development, innovation, financial strength, and social responsibility. The file management25 contains the top 25 companies in the Institute’s ranking based on the composite score (source: The Wall Street Journal). For each company, the industry sector, the company name, and the composite score are given.

a. Create a treemap chart using these data with the sector being the category, company being the subcategory, and the composite score being the quantitative variable. Use “Management Top 25” for the chart title.

b. Which sector has the most companies in the Top 25? Which company has the highest composite score in this sector?