What is the NPV of a project in which you receive $500 today and have to pay $550 in 1 year? Assume all cash flows are certain and that the risk-free rate is 6% per year (APY). Please round your answer to the nearest penny and note that "None of the other answers are correct" would not be the right choice if you were choosing it due to your answer merely differing by less than a few pennies from one of the given numerical choices. O a. None of the other answers are correct Ob. +$50.00 O c +$18.87 O d. $18.87 O e. $21.14 Of. $21.14 O g. $50.00