P1. (20pts) The Rowland Clinic purchased a new surgical laser for $84,000. The estimated salvage value is $4,000. The laser has a useful life of five years and the clinic expects to use it 10,000 hours. It was used 1,600 hours in year 1; 2,100 hours in year 2; 2,400 hours in year 3; 1,900 hours in year 4; 2,000 hours in year 5. Instructions: Compute the annual depreciation for each of the first two years under each of the following methods: (1) straight-line. (2) units-of-activity. (3) double-declining balance method