help. saying ifs wrong

The IRS is concerned with improving the accuracy of tax intorgation given by its representacves over the telephone. Previous studies involved asking a set of 25 questions of a large number of IRS telephone representatives to determine the proportion of correct responses, Historicaliy, the average proportion of correct rosponses has been 70 percent. Recently, IRS representatives have been receiving more training. On April 26, the set of 25 tax questions were again asked of 20 tandomly selected IRS telephone representabives. The proportions of correct answers were: 17,15,19,17,21,15,21,13,17,13,22,16,24,16,17,15,23,10,21,and16. a. What are the uppet ind lower control limits too the approgriate p-chart tor the IRS? Uhe 2 a 3 . The UCL equals and the LCLF equals. (Enter your reaponses rounded to four decimal places. If your anawer for LCL ia negative, enter this value as o.)