Using the Parental HIV data set (see Appendix A), plot a histogram, a boxplot, and a normal probability plot for the variable AGESMOKE. This variable is the age in years when the respondent started smoking. If the respondent did not start smoking, AGESMOKE was assigned a value of zero. Decide what to do about the zero values and if a transformation should be used for this variable if the assumption of normality is made when it is used in a statistical analysis.