Problem #3: (a) Using straight-line depreciation, what is the book value after 5 years for an asset costing $100,000 that has a salvage value of 20,000 after 10 years? What is the depreciation charge in the 9th year? (b) Using decline-balance depreciation with d=15%, what is the book value after 4 years for an asset costing $250,000? What is the depreciation charge in the 5th year? (c) What is the depreciation rate using declining-balance for an asset costing $250,000 and having a salvage value of $20,000 after 10 years