21.) Kristina just won the lottery, and she must choose among three award options. She can elect to receive a lump sum today of $62 million, to receive 10 end-of-year payments of $9.5 million, or to receive 30 end-of-year payments of 5.6 million.

a.)If she thinks she can earn 7% annually, which should she choose?

b.) If she expects to earn 8% annually, which is the best choice?

c.) If she expects to earn 9% annually, which option would you recommend?

D.) Explain how interest rates influence her choice.