Sejati Bhd buys a new machinery for RM10,000 on 1 January 2018. The machinery is estimated to be used for 5 years. After exactly 3 years, however, the machinery is suddenly sold for RM5,000. Sejati Bhd always provide a full years depreciation in the year when assets are purchased and no depreciation in the year when assets are disposed. Required: Prepare the accumulated depreciation for machinery accounts and machinery disposal accounts for years 2018, 2019 and 2020: a. Using the straight-line depreciation method (assume 20% p.a.). b. Using the reducing balance depreciation method (assume 40% p.a.).