Coolbrook Company has the following information available for the past year: Sales revenue River Division $1,202,000 Stream Division $1,812,000 Cost of goods sold and operating expenses 884,000 1,280,000. Net operating income $ 318,000 $ 532,000 $1,070,000 $1,470,000 Average invested assets The company's hurdle rate is 6.76 percent. Required: 1. Calculate return on investment (ROI) and residual income for each division for last year. 2. Recalculate ROI and residual income for the division for each independent situation that follows: a. Operating income increases by 8 percent. b. Operating income decreases by 9 percent. c. The company invests $241,000 in each division, an amount that generates $118,000 additional income per division. d. Coolbrook changes its hurdle rate to 4.76 percent.