Which of the following statements about accounting recognition is (are) true?

The main objective of IAS 36 Impairment of Assets is to prescribe the procedures that should ensure that an entity's assets are included in its statement of financial position at no more than their recoverable amounts. Where an asset is carried at an amount in excess of its recoverable amount, it is said to be impaired and IAS 36 requires an impairment loss to be recognized. Required: Define an impairment loss explaining the relevance of fair value less costs to sell and value in use and state how frequently assets should be tested for impairment. 2. Describe the possible incators of impairment. 3. Explain how an impairment loss is accounted for after it has been calculated.

Is it neccessary  for a business to use the same method of computing depriciation  for all classes of its depriciable assets?