can someone help me with these two questions

How much would you have to invest today to receive the following? (Enter all answers as positive numbers.) a. $16,000 in 6 years at 10 percent. (Round your answer to 2 decimal places.) b. $20,500 in 18 years at 7 percent. (Round your answer to 2 decimal places.) c. $8,500 each year for 17 years at 8 percent. (Round your answer to 2 decimal places.) You have just been notified that you will receive $8,600 a year for the next 16 years from an inherited trust. If the interest rate is 14 percent, how much should you be willing to accept today in exchange for the annual payments? (Enter your answer os a positive number rounded to 2 decimal places.)