Cant figure out this hw question... please explain how you got answer thank you so much!!

You have an investment that will pay you $18,000 per year at the end of each of the next 8 years. Requirement 1: Assuming a discount rate of 15 percent per year, what is the present value of these payments? (Enter rounded answer as directed, but do not use rounded numbers in intermediate calculations. Round your answer to 2 decimal places (e.g., 32.16).) Present value Requirement 2: What is the present value of these payments if they were received at the beginning of each year (rather than at the end)? (Enter rounded answer as directed, but do not use rounded numbers in intermediate calculations. Round your answer to 2 decimal places (e.g., 32.16).) Present value