11.1. The time of blow for fuses under a marginal circuit condition is subject to a maximum specification limit of 150 sec¼U. Experience has shown that sx¼25 sec. Regarding m1¼100 sec as the AQL and m2¼125 sec as the RQL, and setting respective risks of a¼0.10 and b¼0.10, find an appropriate sampling plan. Sketch the OC curve for Pa vs. m, labeling axes.