Need Help ASAP !!

Bonka, Inc., is considering a robot that will cost $5,000 to purchase. At the end of its 9 year life, its salvage value will be $800. The robot will need to be overhauled in year 4 at a cost of $1,000. O&M costs per year will be $750. The robot will generate additional income of $750 per year from increased productivity. Draw the cash flow diagram