For problems $1$ and $2$ all work should be completed in R$.$ Problem $3$ can be typed $($using ${?}^2{T}_{E}x)$ or hand written and scanned as a pdf file. Your Rmd and Knitted PDF file should be titled $[$last name$]-2.$Rmd and $[$last name$]-2.$pdf $($or $[$last name$]-2$a$.$pdf $[$last name$]-2$b$.$pdf$)$

For example, I would turn in sarver$-2.$Rmd and sarver$-2.$pdf

The iris dataset is a popular dataset to use when learning machine learning. The iris dataset is built into $R.$

$($a$)$ Look at the "head" of the dataset to see what the variable are and what the data looks like.

$($b$)$ Display the scatterplot for all possible pairs of variables in the dataset.

$($c$)$ We would like to be able to distinguish between the different species, To do this we can color our data based on the species. use col$=$c$("$blue$","$ red", "green"$)[$iris$Species$]$ within your plot to help distinguish the animals.

$($d$)$ Now we would like to change the shape of the points to make then stand out. Include pch iris$Species$]$ in your plot.