If Marine Industrial Coatings replaces the existing computer system with the new one, over the next 5 years operating income will: a, b, c or d?

please help with this practice problem for my management accounting class.

Marine Industrial Coatings, Inc. is considering replacing its existing computer system with a new computer system. The new system can offer considerable savings in computer processing and inventory management costs. Information about the existing system and the new system follow: Original cost $10,000 $15,000 Annual operating $6,000 ____________ cost Accumulated depreciation Current salvage value of the existing system $4,000 _______________ Remaining life in 5 years Salvage value in 5 years $ 0 $0 Annual depreciation $2,000 $3,000 decrease by $10,000. increase by $5,000. increase by $17, 500. increase by $2, 500