On 1 July 2015, Shark Ltd purchased three machines, each used in a different production process in the factory. On 30 June 2016, there was an indication that the machines could be impaired due to a new competitor entering the market, so Shark Ltd calculated the recoverable amounts of the machines. Twelve months later this threat no longer existed and the recoverable amount was reassessed. Information concerning the machines is summarised in the table opposite. Shark Ltd uses straight-line depreciation over a 5-year period for all machinery. Assume that all three machines had nil residual values at the end of their useful lives. 

Required

(a) Prepare the journal entry to record depreciation for the year ended 30 June 2016.

(b) Prepare the journal entry to record any asset impairment at 30 June 2016.

(c) Prepare the journal entry to record depreciation for the year ended 30 June 2017.

(d) Prepare the journal entry to record any asset impairment or reversal at 30 June 2017.