The Blossom Clinic purchased a new surgical laser for $67,200. The estimated salvage value is $3,200. The laser has a useful life of five years and the clinic expects to use it for 8,000 hours. It was used 1,280 hours in year 1:1,680 hours in year 2;1,920 hours in year 3 ; 1,520 hours in year 4;1,600 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