Answer:
$2,000
Step-by-step explanation:
Net book value at the end of the 3rd year=26,000-((26,000-2,000/6)*3)
=$14,000
Since the useful life of machine is now revised from the 6 years to 10 years, therefore the total remaining useful life of machine is now 7 years instead of 3 years and accordingly the depreciation from year 4 to year 10 shall be calculated as follows:
Depreciation per year from year 4 to year 10=*14,000-0)/7=$2,000