You are examining the outside of the shipping boxes for damage. There are 10 shipments to be examined, where each shipment contains the same number of boxes. For each shipment, you count how many punctures there are amongst all the boxes. The results are given below. 3, 1, 0, 2, 1, 4, 9, 5, 3, 2 (1) Calculate the upper control limit for a c-chart for the average number of punctures per shipment. Please type your answer in 3 decimal places.