Set the slider below the graph to $16\mathrm{.}05$ and push 'Reset'. Observe the simulation of the process. Push 'Reset' several more times. What do you notice about the behavior of the process before and after Period $7?$

a$.$ The sample means almost always fall within the control limits for all Periods.

b$.$ The sample means are within the control limits at first, but fall outside the limits after Period $7.$

c$.$ The sample means are outside the control limits at first but fall within the limits after Period $7.$

d$.$ The sample means consistently fall outside the control limits for all Periods.

Set the slider below the graph to $16\mathrm{.}21$ and push 'Reset'. Observe the simulation of the process. Push 'Reset' several more times. What do you notice about the behavior of the process before and after Period $7?$

a$.$ The sample means almost always fall within the control limits for all Periods.

b$.$ The sample means are within the control limits at first, but fall outside the limits after Period $7.$

c$.$ The sample means are outside the control limits at first but fall within the limits after Period $7.$

d$.$ The sample means consistently fall outside the control limits for all Periods.

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