Please Help me by answering all parts I will really appreciate it, just show work foe the long answer no need for the multiple choice

8. Assume a project has cash flows of -$54,300, $17,200, $39,300, and $14,300 for Years 0 to 3, respectively. What is the net present value given a required return of 15.6 percent, and should you accept the project? A.235.36, accept B. -755.50; accept C. -954.23; reject D. -755.50; reject E. None of the above 11. A project will produce cash inflows of $7,240 a year for 3 years with a final cash inflow of $3,400 in Year 5. The project's initial cost is $17,400. What is the net present value if the required rate of return is 14.2 percent, and should you accept this project? A.1,351.38, accept B. 1,989.25; accept C. 1,102.81; accept D. 1,755.20; accept E. None of the above 12. Based on the information from (11), what would be the internal rate of return for this project? A. 17.46% B. 19.38% C. 14.78% D. 11.33% E. None of the above Long answer: NPV is the most important investment criterion we should rely on, then what are the challenges in real life if we want to calculate NPV for a certain project