Question one: $(7$ marks$)$

The following table lists the stock prices for Microsoft from $2017-2022.$ The company did not pay any dividends during the period.

$\backslash$table$[[$Year$,$Price,Dividends$],[2017,35\mathrm{.}1,2],[2018,32\mathrm{.}6,2],[2019,36\mathrm{.}8,2],[2020,29\mathrm{.}9,1],[2021,25\mathrm{.}8,1],[2022,23\mathrm{.}8,1]]$

a$.$ Estimate the average annual return you would have made on your investment. b$.$ Estimate the standard deviation in annual returns.