A new CNC machine has an installed with a cost basis of $35,000 and an estimated service life of seven years. It will have a zero salvage value at that time. The 200% declining balance method is used to depreciate this asset. a. What will the depreciation charge be in year seven? b. What will be the book value at the end of year six? c. What will be the gain (or loss) on the disposal of the asset if it is sold for $1,200 after six years