Homework help part 1-2 please ??

Reeve Corporation purchased a factory machine on JAN 1st, Year 1, for $40,000, estimated a useful life of 8 years, and estimated Residual Value (Scrap Value) of $4,000. 1. Using the Straight Line Method, calculate Depreciation Expense for Years 1 thru 8. Calculate Book Value for Years Ending 1 thru 8. 2. Using the Double Declining Balance Method, calculate Depreciation Expense for Years 1 thru 8. Calculate Book Value for Years Ending 1 thru 8. Reeve Corporation estimated the factory machine purchased on JAN 1st, Year 1, for $40, 000, has a Residual Value of $4, 000