given a situation where a control chart with 3 sigma limits is being constructed to monitor the percentage of defective items produced by a process,

given a situation where a control chart with 3 sigma limits is being constructed to monitor the percentage of defective items produced by a process, if samples of   100 units each are taken from the process and the average percent defective found in the first 10 samples is .06 (6%), what is the upper control limit (rounded to two decimal places) for the process?

a. .06

b. .13

c. .16

d. .18

e. .24