Coolbrook Company has the following information available for the past year: River Division $1,219,000 890,000 Stream Division Sales revenue Cost of goods sold and operating expenses $ 1,816,000 1, 300, $ Net operating income $ 329,000 516,000 Average invested assets $ 1,170,000 $ 1,530,000 The company's hurdle rate is 7.76 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 11 percent. b. Operating income decreases by 11 percent. c. The company invests $253,000 in each division, an amount that generates $114,000 additional income per division. d. Coolbrook changes its hurdle rate to 5.76 percent