An earthwork contractor is considering to purchase a new excavator which will cost $130,000 including tax and transportation expenses. Answer the following questions about depreciation. Note: GDS (General Depreciation System) are ADS (Alternative Depreciation System) are two methods of Modified Accelerated Cost Recovery System (MACRS). Using the ADS method, what is the depreciation in year 7 ? Using the GDS method, what is the book value at the end of 4th year? Using the ADS method, what is the book value at the end of year 4 ? Using the ADS method, what is the cumulative depreciation after 3 year? Using the GDS method, what is the depreciation in year 2? Using the GDS method, what is the cumulative depreciation after 3 years