The Sunland Clinic purchased a new surgical laser for $218.400. The estimated salvage value is $10.400. The laser has a useful life of five years and the clinic expects to use it for 20,000 hours. It was used 4,160 hours in year 1;5,460 hours in year 2;6,240 hours in year 3,4,940 hours in year 4;5,200 hours in year 5. (a) Compute the annual depreciation for each of the five years under each of the following methods: (1) straight-line. (2) units-of-activity