8.6. A steel plant was producing hot-rolled bars which were shipped to a customer who cold drew them. After cold drawing, the bars were inspected and certain ones rejected for defects purporting to originate in the steel plant. Rejections were totaled for each month and expressed as a percentage of the total drawn. Twenty-four monthly figures in percent rejection follow: 4.4, 2.9, 4.2, 5.4, 6.6, 3.6, 1.0, 1.3, 1.2, 1.2, 1.0, 2.8, 2.0, 3.0, 1.8, 2.3, 1.3, 5.2, 4.1, 4.3, 5.3, 5.3, 0.6, 0.8. Make an x chart (2s limits) and a moving range chart and comment.