Please do not use excel. I am confused about how to do the problem by hand.

Problem 8-13 NPV/IRR (LO1, LO2) Here are the cash flows for a project under consideration: -$7,730 C1 +$5,680 C2 +$19,560 a. Calculate the project's net present value for discount rates of O, 50%, and 100%. (Round your answers to the nearest whole dollar.) Answer is not complete. Discount Rate Net Present Value $ 17,510 s 4,750 0% 50% 100% b. What is the IRR of the project? (Do not round Intermediate calculations. Enter your answer as a whole percent.) IRR %