Homework help question 3 please ??

Reeve Corporation estimated the factory machine purchased on JAN 1st, Year 1, for $40,000, has a Residual Value of $4,000, and an estimated useful life of 20,000 operating hours over the 8 year life of the asset. Estimated Operating Hours: Year 1- 2,000, Year 2- 2,000, Year 3- 2,000, Year 4- 2,000, Year 5- 2,000, Year 6- 4,000, Year 7- 4,000, and Year 8- 2,000. 3.. Using the Units of Activity Method, calculate Depreciation Expense for Years 1 thru 8. Calculate Book Value for Years Ending 1-8