Refer to Exercise 9-33 on the order completion time of a logistics firm. Upon conducting a methods study of the various operations, the firm was able to reduce the mean times of operation 1 to 5.8 hours and that of operation 3 to 7.5 hours. Assume that the tolerances did not change. The customer requires an order completion time of 23.2 hours. Assuming normality, what proportion of orders will not meet the customer requirements?