Please help me answer this question, neat and clear! Thank you!

Required Information Chapter 10: Applying Excel (L010-1, L010-2] The Chapter 10 Form worksheet is to be used to create your own worksheet version of the Review Problem example in the text. Chapter 10: Applying Excel: Exercise (Part 2 of 2) Requirement 2: Revise the data in your worksheet os follows: B A Chapter 10: Applying Excel 1 2 3 Data 4 5 Sales Net operating income Average operating assets Minumum required rate of return S 85,000,000 $ 11,900,000 $ 17,000,000 21% 6 7 If your formules are correct, you should get the correct answers to the following questions. 2. What is the ROI? ROI % b. What is the residual income? (Negative amount should be Indicated by a minus sign. Residual income c. Why is the residual income positive