Compute the geometric average of the returns.

Note: Do not round intermediate calculations.

Years

$1$

$-$

$1$

$0$

$.$

$7$

$\%$

Year

$2$

$-$

$-$

$1$

$5$

$.$

$5$

$\%$

Year

$3$

$-$

$1$

$9$

$.$

$8$

$\%$

Year

$4$

$-$

$1$

$8$

$.$

$6$

$\%$