4) A firm considers to buy a new 3D printer whose cost is $ 46 100. The cost of 3D printer will be paid in 2020. The expected cash flows of this investment are as follows: 2021: $ 13 200 2022: $ 13 200 2023: $ 13 200 2024: $ 13 200 2025: $ 13 200 The firm plans to sell this 3D printer at the end of 2025 and expects that it can sell the 3D printer in the market for $ 20 000 (the salvage value of the 3D printer is $ 20 000) a) Find the Internal Rate of Return (IRR) of this project. b) Given that the current annual interest rate is 15% and the risk premium appropriate for this investment is 5%; should the firm accept or reject this investment