Answer:
Straight-line method
Year Depreciation Book value
1 $66,250 $233,750
2 $66,250 $167,500
3 $66,250 $101,250
4 $66,250 $35,000
Declining-balance method
Year Depreciation Book value
1 $150,000 $150,000
2 $75,000 $75,000
3 $37,500 $37,500
4 $2,500 $35,000