3) You work for Tesla. Your boss asked you to prepare the economic analysis for the purchase of a robot to be used in the production of its automobiles. You have narrowed your search to three robot models: Model A, Model B, and Model C. The data associated with each robot is in the table. For example, Model A's first cost (initial investment) is $50,000. The annual operating costs associated with Model A are $10,000. The service life of Model A is 3 years. If you sell Model A at the end of one year of service, the salvage value is $15,000. If you hold it for the entire service life of 3 years, the salvage value is $8,000. Model A $ 50,000 $10,000 3 Model B $ 80,000 $9,000 4 Model C $ 120,000 $12,000 6 Initial Investment Annual Operating Costs Service Life Expected Salvage Values if Disposed (sold) before the end of the service life Salvage Value at End of 1 Year of Use Salvage Value at End of 2 Years of Use Salvage Value at End of 3 Years of Use Salvage Value at End of 4 Years of Use Salvage Value at End of 5 Years of Use Salvage Value at End of 6 Years of Use $ 15,000 $ 10,000 $ 8,000 N/A N/A N/A $ 60,000 $ 50,000 $ 40,000 $ 20,000 N/A N/A $ 100,000 $ 90,000 $ 80,000 $ 70,000 $ 50,000 $ 30,000 a) DRAW the cash flow diagram needed to properly calculate NPW for MODEL B. It is NOT necessary to draw the cash flow diagrams for Models A and C points) b) Using either NPW or AE, determine which Model is the best economic choice. Clearly indicate which model (Model A, Model B, or Modelwill you recommend to your boss for purchase? You must show your work for credit. Assume that MARR is 5%. (9 points)