Mesopotamian materials inc. (mmi) has two decentralized divisions (ur and babylon) that have decision making responsibility over the amount of resources invested in their divisions. recent financial extracts for both divisions are presented below: ur babylon fixed assets, gross $ 2,500 $ 4,000 accumulated depreciation $ 1,500 $ 1,200 other assets $ 500 $ 750 liabilities $ 500 $ 1000 sales $ 6,750 $ 7,200 net income after tax* $ 743 $ 1,008 average age of fixed assets (years) 15 5 *net income is after tax but before interest mmi's weighted average cost of capital (wacc) is 11.5%. the mmi measures division performance based on the book value of net assets. the producer price index 15 years ago was 100, 116 five years ago, and currently is 125. using historical costs, which is true? babylon is a profit center at a wacc of 5%, ur's residual income is lower than babylon's by $122 at the planned wacc (11.5%), ur's residual income is higher than babylon's by $87 at a wacc of 25%, ur's residual income is higher than babylon's by $122 none of the above