The table below summarizes the number of surface flaws found on the paintwork of new cars following their inspection after primer paint was applied by a new method: No. of flaws No. of cars 0 3 1 7 2 12 3 11 3 2 2 4 5 6 Part a) Find the mean number of flaws per car. Please give your answer to two decimal places. The mean number of flaws per car is: Part b) Find the variance of the number of flaws per car. Please give your answer to two decimal places. The variance of the number of flaws per car is: