Galvanized Products is considering purchasing a new computer system for their enterprise data management system. The vendor has quoted a purchase price of $120,000. Galvanized Products is planning to borrow one fourth of the purchase price from a bank at 13% compounded annually. The loan is to be repaid using equal annual payments over a 3-year period. The computer system is expected to last 5 years and has a salvage value of $5,500 at that time. Over the 5-year period, Galvanized Products expects to pay a technician $28,000 per year to maintain the system but will save $51,000 per year through increased efficiencies. Galvanized Products uses a MARR of 17%%/year to evaluate investments. a. What is the external rate of return of this investment? ERR - %% Do all calculations to 5 decimal places and round your final answer to 2 decimal places. Tolerance is +/:2 b. What is the decision rule for judging the attractiveness of investments based on external rate of return? c. Should the new computer system be purchased? Click here to access the TVM Factor Table Calculator Please use solution approach with the positive cash flows (Rt) and negative cash flows (Ct) before netting for ERR calculation