randomly selected IRS telephone representatives. The proportions of correct answers were: 18,16,19,21,20,16,21,16,17,10,25,18,25,16,20,15,23,19,21, and 19. a. What are the upper and lower control limits for the appropriate p-chart for the IRS? Use z=3. The UCLp equals and the LCLp equals (Enter your responses rounded to four decimal places. If your answer for LCLp is negative, enter this value as 0.)