. 4 An asset was purchased three years ago, at the beginning of Year 1, for $ . 100,000. Its expected useful life was six years and its expected residual value was $ 10,000. It has now been re-valued to $ 120,000. Its remaining useful life is now estimated to be three years and its estimated residual value is now $ 15,000. The straight-line method of depreciation is used. Required (a) What is the transfer to the revaluation surplus at the end of Year 3? (b) What is the annual depreciation charge in Year 4? (c) What is the carrying amount of the asset at the end of Year 4