4-3 B-$270,000; SV $15,000; recovery period -8 years. a. Using DDB, construct a table showing yearly depreciation and book value. b. Construct a table showing DDB switching to SL depreciation. 4-4 B-S45,000, sV $8,000; recovery period-7 years. a. Using DDB, construct a table showing yearly depreciation and book value. b. Using MACRS, construct a table showing yearly depreciation and book value