The iRs is concemed with improving the accurasy of tax information given by its represontativet over the telephone. Previous tudies involved asking a sot of 25 questions of a large number of iRs telephone representatives ta determine the proportion of correct responses. Historically, the average proporion of correct responses has been 70 percent. Recently, IRS representativns have been recoiving more training. On Apri 26, the set of 25 tax quessons were again asked of 20 mandomly aelected IRs telophone ropresentafives. The proporticns of comrect anawers were: 15,16,19,14,17,19,21,16,17,16,24,17,22,15,16,9,23,21,21,and16 a. What are the upper and lower control limts for the approprate p-chart for the IRS? Use z=3. The UClp equals and the LCL2 equals 00192 . (Enter your rosponses mounded to four decimal plecos. If your answer for LCL, is negative, enter this value as o. b. is the tax information process in statistical control? Since there the process is considered to be statistical control is at least one proportion dofective below the lower control imin is at least one data point above the upper control limit is at least one proportion defective within the control linsts are no data points outside of the control Imts