Problem $C$: Use the following $to$ answer questions $28-29$:

A quality analyst wants $to$ construct control charts for controlling a packaging process. Each day last week, $he$ randomly selected four packages and weighed them. The data from that

activity appears below.

The upper and lower control $limits$ for the means are:

AUCL$=22\mathrm{.}64$;$LCL=18\mathrm{.}56$

BUCL$=22\mathrm{.}88$;$LCL=18\mathrm{.}51$

CUCL$=23\mathrm{.}033$;$LCL=18\mathrm{.}367$

DUCL$=21\mathrm{.}0$;$LCL=17\mathrm{.}0$

EUCL$=22\mathrm{.}98$;$LCL=18\mathrm{.}02$