your grandfather has offered you a choice of one of the 3 following alternatives:
1) $7,500 now
2) $2,200 a year for 9 years
3)$31,000 at the end of 9 years
assuming you could earn 10% annually, which alternatives should you choose?
if you could earn 11% annually would you still choose the same alternatives?

use the MS excel PV function ​