question $8$ Super Cola bottles soft drinks labeled $$net weight $12$ ounces.$$ Indeed, an overall process average of $12$ ounces has been found by taking $10$ samples, in which each sample contained $5$ bottles.

Determine the upper and lower control limits for this process $($x$-$chart$)$

question $9$

Roy Clinton's mail$-$ordering business wants to measure the response time of its operators in taking customer orders over the phone. Clinton lists below the time recorded in minutes from five different samples of the ordering process with $3$ customer orders per sample.

Determine the upper and lower range control chart limits$.$

I need help on how to solve this in excel