Betty and Bob Mutual Fund has generated the following effective rates

of return for the last six years respectively:

$\mathrm{.}18,-\mathrm{.}15,\mathrm{.}50,\mathrm{.}06,\mathrm{.}24,\mathrm{.}10$

Find the equivalent effective rate of return for the six years. Your final answer

should be correct to $3$ places after the decimal point.