You have the following rates of return for a risky portfolio for several recent years. Assume that the stock pays no dividends.

$\backslash$table$[[$Mear$,\backslash$table$[[$Beginning of$],[$Year Price$]],\backslash$table$[[$# of Shares$],[$Bought or Sold$]]],[$Yea bought,,$],[2016,$$$35,120$ bo$],[2017,$$$40,70$ bought$],[2018,$$$36,95$ sold$],[2019,$$$39,95$ sold$]]$

What is the geometric average return for the period?