Comment on whether the chair manufacturer's process in the previous question.

Question $5$ options:

The process appears to be in control.

Unable to comment on the process with the given information.

It appears that the process may be going out of control. Management should investigate $($particularly samples $6-7$ and $19-20)$ and take corrective action.

It appears that the process may be going out of control, but it is likely due to natural $($random$)$ variation and no further action is currently recommended.