(a) Using straight-line depreciation, what is the book value after four years for an asset costing $150 000 that has a salvage value of $25 000 after 10 years? What is the depreciation charge in the fifth year?

(b) Using declining-balance depreciation with d 20 percent, what is the book value after four years for an asset costing $150 000? What is the depreciation charge in the fifth year?

(c) What is the depreciation rate using declining-balance for an asset costing $150 000 that has a salvage value of $25 000 after 10 years?