More Univariate Analysis of EJB Data. In the EJB example discussed within the chapter, univariate analysis was demonstrated on some of the variables. We continue this analysis in this problem. a. Using a PivotChart, construct the relative frequency distribution of records over the values of the Category variable. Describe your findings. b. Using a PivotChart, construct the relative frequency distribution of records over the values of the New Customer variable. In the PivotTable, relabel a No value for New Customer as Existing and a Yes value as New. Describe your findings.