Nash Inc. owns the following assets. Asset Cost Salvage Estimated Useful Life A $70,200 $7,020 10 years B 50,300 5,030 C 83,640 4,080 5 years 12 years Compute the composite depreciation rate and the composite life of Nash's assets. (Round answers to 1 decimal place, e.g. 4.8% or 4.8 years.) Composite depreciation rate Composite life % years