) Following are the annual incomes of fifteen CPAs in thousands of dollars: 88 77 70 80 74 82 85 96 76 67 80 75 73 93 72 (a) Draw a boxplot , indicate all five numbers and use it to judge the symmetry or skewness of the data. (b) What else would you suggest to use to check whether you conclusion in (a) is correct or not.