$(10$ points$)$ The production process of computer discs generated the following data for the dis

diameter in a trial run:

Sample $1$ Sample $2$ Sample $3$ Sample $4$ Sample $5$

$101110910$

$81091010$

$109101111$

$111081210$

The production engineer has decided to use this data to establish trial control limits to monitor

this production process. how the center line and the upper and lower control limits of this control

chart.