Using the str$()$ function we can look at the structure of a dataset. str$()$ takes the name of the data set as its first argument. The output shows the variable names, their type, and the values of the first observations.

The am variable indicates whether a car has an automatic or manual transmission. Perform the str$()$ function on mtcars in your console and look at your output. According to R$,$ what type of variable is am$?$