4. On 30 June 2023 , the end of the current reporting period, Lynch Ltd made a decision, using the information obtained over the past few years, to revise the useful life of a particular item of its buildings acquired ten years earlier for $2000000. The useful life was revised from being a total of 25 years to being a total of 15 years. The building was originally depreciated on the straight-line basis over its useful life and it was expected that the asset would have no residual value. No depreciation has been provided in the current period. (a) Prepare the journal entry to account for the change in accounting estimate. (b) Assuming that the change in accounting estimate had a material effect on financial performance for the period, prepare an appropriate supporting note. ( LO 16.8