A schedule of machinery owned by Coronado Industries is presented below: Estimated Estimated Total Cost Salvage Value Life in Years Machine X $612000 $38000 14 Machine Y 796000 82000 10 Machine Z 289000 58000 6 Coronado computes depreciation by the composite method. The composite rate of depreciation (in percent) for these assets is 8.27. 13.72. 8.89. 10.31