Please help!

A. Calculate the operating income percentage for each of the courses. Round your percentages to one decimal place. Course Blue Course Black Course Gold B. 1. Perform a vertical analysis for each course. Round your percentages to one decimal place. 2. Based on a vertical analysis of each course, which accounts would you want to investigate further? C. Which method of analysis (using a dollar value or percentage) is most relevant and/or useful? Why