$2.$ a$.$ Define a function that calculates the coefficient of variation $($cv$($x$)=$ stdev$($x$)/$mean$($x$))$

b$.$ Calculate the standard deviation and mean from $2$ different pre$-$loaded R data sets $($e$.$g$.,$

Loblolly, Orange, or use data$()$ in RStudio for a complete list...$),$ and write each to an object

$($e$.$g$.,$ Loblolly$\_$

c$.$ Call the function and calculate the cv separately for each data set

d$.$ Return the cv$,$ mean, stdev, and datasetname$/$variable after each function call