4. (20%) The book value of year n for the straight-line method can be rewritten as B. =((N n)/N)" (1-5)+S with e - I, where 2-1 2. ... N. If a = 2 is used, the proposed method, no longer a straight-line method, has an acceleration effect. (a) (10%) Derived the depreciation D, for a given year n in terms of I, S, N, and n for a = 2 (b) (10%) Compute the annual depreciation and the book values of each year for 1 *S10,000, S - $2.000, and N-5 years for a 5 (2007 4. (20%) The book value of year n for the straight-line method can be rewritten as B. =((N n)/N)" (1-5)+S with e - I, where 2-1 2. ... N. If a = 2 is used, the proposed method, no longer a straight-line method, has an acceleration effect. (a) (10%) Derived the depreciation D, for a given year n in terms of I, S, N, and n for a = 2 (b) (10%) Compute the annual depreciation and the book values of each year for 1 *S10,000, S - $2.000, and N-5 years for a 5 (2007