I need help with problems 17 and 18. Thank You.

Question 17 Not yet answered Which of the following is an example of a sunk cost? Points out of 1 P Flag question Select one a. The firm pays to replant trees following the clear cutting of 1,000 acres during a timber harvest b. The fum spends $20 million on heart medication research and discovers a promising drug. c. The film replaces a piece of manufacturing equipment to maintain curtent manufacturing capacity d. A bank opens a new office, and the new office leads to a decline in deposits at the bank's other offices. e. All of the above are examples of sunk costs. Question 18 Which of the following is CORRECT? Not yet answered Select one: Points out of 1 @ P Flag question a. If the NPV of a project is negative, the IRR for the project must also be negative. b. A project's MIRR can never exceed its IRR. c. If a project with normal cash flows has an IRR less than WACC, the project must have a positive NPV d. If Project I's IRR exceeds Project 2's IRR, then 1 must have a higher NPV than 2 e. If a project with normal cash flows has an IRR greater than WACC, the project must have a positive NPV. estion 19 out yet answered The LMN Corporation had Net Operating Working Capital in 2019 of $1.200 and $1,400 in 2020. L.MN has EBIT of $3,000, Deprecia Amortization of $450, and Capital Expenditures of $600. If LMN has a corporate tax rate of 21%, what is the free cash flow for the Select one: ints out of 1