Can you give me an example of how to do this? We used the info from two other stocks.

Risk free rate is $\mathrm{.}25\%$ per month

Create a scatter plot of the means returns $($y$-$axis$)$ against the standard deviation of returns $($x$-$axis$).$ Includes all the assets. Also include the risk free rate $($ask yourself, what is the standard deviation of the risk free rate?$)$