5 (20 points): An investor is given the opportunity to invest in one of two projects: Project A costs $10 000 now and pays back $3000 at the end of each year for 4 years. Project B costs $15 000 now and pays back $3500 at the end of each year for 5 years. The current interest rate is 2%. a. Calculate the net present values (NPV) and the internal rate of return (IRR) of these projects b. Would you advise the investor to invest in project A or B