1. Fill in the book value at the end of year one under each depreciation method when residual value is $36,000, and the salvage value is

$36, 000 useful life is four years:

I need the answers to complete the output, straight line, & double declining.

2. Fill in depreciation expense in year three under each depreciation method when residual value is $30,000 and the Salvage value is $30,000 useful life is three years:

May you explain this step by step?

Depreciation method:
Straight-line
Units-of-Output
Double-declining Cost-$30,000 and $36,000