The Pronghorn Clinic purchased a new surgical laser for $99,500. The estimated salvage value is $5,000. The laser has a useful life of five years and the clinic epects to use it 10,500 hours. It was used 1,700 hours in year 1;2,300 hours in year 2,2,500 hours in year 3 i 1,900 hours in year 4;2,100 hours in year 5 , (a) Compute the anhual depreciation for each of the five years under straight-iline and units of-activity methods