The following given is the $911$ call data.

Call Time Call Time Call Time

$11$:$01151$:$26292$:$03$

$21$:$04161$:$31302$:$05$

$31$:$04171$:$36312$:$05$

$41$:$06181$:$39322$:$06$

$51$:$08191$:$43332$:$07$

$61$:$08201$:$45342$:$09$

$71$:$09211$:$49352$:$10$

$81$:$09221$:$50362$:$11$

$91$:$11231$:$55372$:$13$

$101$:$15242$:$01382$:$13$

$111$:$15252$:$01392$:$15$

$121$:$16262$:$02402$:$16$

$131$:$19272$:$03412$:$17$

$141$:$23282$:$03422$:$19$

a$.$ Select the Run chart for the above data. Use five$-$minute intervals $($i$.$e$.,$ count the calls received in each five$-$minute interval. Use intervals of $04,59,$ etc.$).$ Note: Two or more calls may occur in the same minute; there were three operators on duty this night.