please show how its calculated

Question 8 1 pts A truck is purchased for $35,000. It has a five-year life and a $5,000 salvage value. Under the straight-line method, what is the asset's BOOK VALUE after three years? $23,000 $18,000 $17,000 $12,000 Question 9 1 pts A truck is purchased for $35,000. It has a five-year life and a $5,000 residual value. Under the double-declining-balance method, what is the ACCUMULATED DEPRECIATION after two years? $19,200 $21,200 $22.400 $25,600