XYZ stock price and dividend history are as follows:

Year Beginning$-$of$-$Year Price Dividend Paid at Year$-$End

$2018$ $ $106$ $ $5$

$20191015$

$2020895$

$2021945$

An investor buys three shares of XYZ at the beginning of $2018,$ buys another two shares at the beginning of $2019,$ sells one share at the beginning of $2020,$ and sells all four remaining shares at the beginning of $2021.$

Required:

a$.$ What are the arithmetic and geometric average time$-$weighted rates of return for the investor? $($Do not round intermediate calculations. Round your answers to $2$ decimal places.$)$