1. (9-48) A project requires an investment of $210 K; construction will take 3 years: $55K during first year, $85K second year, and $70K during the third year construction. Two project operation periods are being considered: 10 years with expected net profit of $50 K per year and 20 years with net profit of $35K per year. Assume all cash flow occur at the end of the year. The company MARR is 15%. of Calculate a. Payback period b. Total equivalent investment cost at the end of the construction period c. Equivalent uniform annual worth of the project (use the operation period of each alternative) d. Which operation period should be chosen