A new electric saw for cutting small pieces of lumber in a furniture manufacturing plant has a cost basis of $4000 and a 10-year depreciable life. The estimated SV of the saw is zero at the end of 10 years. Use the DB method to calculate the annual depreciation amount when :

a) R=2/N ( 200% DB Method) b) R=1.5/N (150% DB Method) Please use hand calculations with all details.