L 2. b. While preparing financial statements of AB Ltd, you noted the following events: AB changed its accounting for land and building from cost model to revaluation model. The useful life of plant was revised downwards following impairment loss. weighted average. Reducing balann mither shaght line The depreciation method for depreciating furniture was changed from PPO so iv. It was discovered that last year company's inventory sheets were under-cased. V. It was discovered that actual NRV of inventory was much lower than expected. Required: In accordance with IAS 8: Accounting Policies, Changes in Accounting Estimates and Errors, state whether the above are changes in accounting policies, accounting estimates or errors