Problem $5\mathrm{.}2($a$)$

$xYZ$ stock price and dividend history are as follows:

$\backslash$table$[[$Year$,$Beginning$-$of$-$Year Price,Dividend Paid at Year$-$End$],[2015,1,],[,$$$0,],[2016,8,],[,1,4],[2017,1,],[,2,],[2018,9,],[,8,4]]$

An investor buys four shares of XYZ at the beginning of $2015,$ buys another three shares at the beginning of $2016,$ sells one share at the beginning of $2017,$ and sells all six remaining shares at the beginning of $2018.$

What is the arithmetic average rate of return for the investor? $($Do not round intermediate calculations. Enter your answer in percentage points. Round your answers to $2$ decimal places.$)$