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We have the output of book depreciation analysis. The analysis provides annual depreciation amount for an asset using different methods. We do not know which method was used for each book depreciation output; however, we have the final output. The sequences of annual depreciation amount for each method A-E are given as follows: A: 2000, 2000, 2000, 2000, 2000 B: 4500*, 3150, 2212, 1548, 1077 C: 2500, 1500, 3000, 1000, 2000 D: 6000, 3600, 133, 133, 133 E: 3333, 2667, 2000, 1333, 667 * For example, the first depreciation amount for method A in the first year is $2000. There are four methods that could potentially have been used: Straight Line, Declining Balance, Declining Balance with Switching, and Unit of Production Method. [a] Discuss, which book depreciation method (or methods) was (or were) used to produce sequence D? [b] Can you find one book depreciation method using which all sequences (A to E) could be theoretically produced