please help me answer this question, especially b) which method is better?

1. Puteri purchases a commercial refrigerator for her restaurant at a cost of RM 30,000 . The life of the refrigerator is 5 years, and the scrap value is estimated to be RM4,500. a. Construct the depreciation schedule for the first four year's depreciation of the commercial refrigerator using the sum-of-the-years-digits method. Show all calculations. [10 marks] b. Double-declining balance method is better than sum-of-the-years-digits method. Explain your answer if you agree or disagree with the statement. [10 marks]