you know that the average defect rate for a pen producer is 0.0315. this production process is assumed to be in control if the defect rate is within three standard deviations of the mean. samples are taken of 100 pens each. what is the upper control limit for this process? a. 0.068 b. 0.112 c. 0.058 d. 0.049 e. 0.063 f. 0.077 g. 0.084