Select a particular model of car and perform some descriptive statistics regarding its annual per unit sales over the last five calendar years (2016-2020). List the sales (unit sales) by year and the source of the information. No credit for this case will be given without the data source provided. Then, calculate the population standard deviation of those sales by year, calculate the mean sales of the data set, calculate the median sales of the data set, and draw a box and whiskers diagram of the data set. All calculations must be shown "long hand" - any answers provided that do not have all supporting calculations shown will receive no credit. Select a second model of car, list its per unit sales for the same five-year period, and calculate its population standard deviation. Indicate the source for your information. You may use Excel for this or a calculator - you do not have to do this calculation "long hand." Then compare the standard deviations of the two cars and write a short essay as to which car, if this history is a good predictor of future performance next year, is riskier in terms of per unit sales