Cant figure this out! please explain how you got the answer thanks so much!

Module 5 Homework Saved 1 Pierce Co has identified an investment project with the following cash flows. Year 1 10 points 2 3 4 Cash Flow $ 570 840 1,280 1,400 03 01:18:15 eBook a. If the discount rate is 10 percent, what is the present value of these cash flows? (Do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16.) b. What is the present value at 18 percent? (Do not round intermediate calculations and round your answer to 2 decimal places, e.g. 32.16.) c. What is the present value at 22 percent? (Do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16.) a. Present value b. Prosent value c. Present value