Answer questions $(3)-(7)$ based on the following information regarding the purchase of equipment.

Cost: $$5,000$

Salvage value: $$1,000$

Estimated useful life $($in years$)$: $4$ years

Estimated useful life $($in hours$)$: $20,000$ Under the double declining balance method, what is the depreciation expense in the first year?

a$)$ $$1,000$ c$)$ $$2,000$

b$)$ $$1,250$ d$)$ $$2,500$

$6)$ Under the double declining balance method, what is the depreciation expense in the second year?

a$)$ $$1,000$ c$)$ $$2,000$

b$)$ $$1,250$ d$)$ $$2,500$

$7)$ Under the units of activity method, what would be the depreciation expense if the machine was used in the first year for $6,000$ hours?

a$)$ $ $600$ c$)$ $$1,500$

b$)$ $$1,200$ d$)$ $$4,000$