Suppose we have a data set named BronlynsExamData. This data set has variables named: Revenue: revenue in dollars Budget: operating budget in dollars WaitTime: customer wait time in line (in minutes) Score: customer satisfaction score (in points) Employees: Number of employees working Suppose we would to determine the average of the variable WaitTime using all rows of data in the dataset. What R command(s) would use use? Question 17 options: Model <- lm(WaitTime ~ Revenue + Budget + Score + Employees, data=BronlynsExamData) summary(Model) Model <- lm(Revenue ~ WaitTime, data=BronlynsExamData) summary(Model) average(WaitTime) help(WaitTime) summary(BronlynsExamData)