Exploring the assigned values of character variables can demonstrate patterns and inherent orderings. The default ordering of levels in SAS is alphabetical order. The levels of many character variables have an inherent ordering of magnitude. For example, non$-$smokers smoke less than light smokers who smoke less than moderate smokers.

$2.$ Tabulate the levels of the character variables in the SASHELP.HEART dataset. For each of the character variables:

a$.$ What data values or levels are observed for each?