For the series of annual returns below, what is the 10-year average annual return based on the arithmetric average?

Year Return Year Return

1 6% 6 5%

2 3% 7 -12%

3 4% 8 25%

4 -15% 9 -20%

5 40% 10 13%

For the series of annual returns given above, what is the 10-year average annual return based on the geometric average?