Packaging CDs (6.2, 5.3) A manufacturer of compact discs (CDs) wants to be sure that their CDs will fit inside the plastic cases they have bought for packaging. Both the CDs and the cases are circular. According to the supplier, the plastic cases vary Normally with mean diameter m = 4.2 inches and standard deviation s = 0.05 inches. The CD manufacturer decides to produce CDs with mean diameter m = 4 inches. Their diameters follow a Normal distribution with s = 0.1 inches.