An investor recorded the following annual returns of one of his investments.

You are

required to calculate and comment on;

i$.$ Mean return.

ii$.$ Variance and standard deviation of the return. iii. Geometric return.

Year

$2016$

$2017$

$2018$

$2019$

$2020$

Return

$15\%$

$17\%$

$19\%$

$10\%-5\%$