Answer each of the following questions.

a. What single investment made today, earning 10% annual interest, will be worth $6,000 at the end of 6 years?

b. What is the present value of $6,000 to be received at the end of 6 years if the discount rate is 10%?

c. What is the most you would pay today for a promise to repay you $6,000 at the end of 6 years if your opportunity cost is 10%?

d. Compare, contrast, and discuss your findings in parts a through c.