A stock had the following returns over a seven year period. The risk-free rate over that period was 4.5 percent. What was the stock's risk premium?

Year	Return
1	10%
2	0%
3	17%
4	-20%
5	15%
6	23%
7	-10%

Group of answer choices

6.40%

1.40%

2.50%

0.50%

1.50%