$8.(10$ points$)$ Examine the following control charts. Identify which charts $($if any$)$ exhibit

criteria that would indicate an out of control process. State explicitly the criteria that has been

exhibited and when $($i$.$e$.$ sample number$)$ that criteria has been established. If no criteria is

shown, mark the chart as in control. Note that there three more charts on the next page, for a

total of five.

a$)$

b$)$