Problem #3 Ratched Limited has a calendar year end and purchased a new computer system for $80,000 on January 1, 2015 It is estimated that the computer will have an $8,000 residual value at the end of its 5-year useful service life. The double diminishing-balance method.of depreciation is used. Instructions (a) Prepare a depreciation schedule that shows the annual depreciation expense on the computer for the first three years of its useful life. (4 marks) (b) Assume that the computer system was sold for $15,000 on April 1, 2018. Record the disposal its disposal