i got two problems wrong and i$\text{'}$m not sure how i got it wrong

$($If the lower control limit is negative, round the LCL to zero and all other answers to $2$

decimal places, e$.$g$.15\mathrm{.}25.)$

$CL$

UCL

LCLU$-$learn University uses a c$-$chart to monitor student complaints per week. Complaints

have been recorded over the past ten weeks. Develop $3-$sigma control limits using the

following data: If the lower control limit is negative, round the lcl to zero and all other answers to $2$ decimal places, e$.$g$.15\mathrm{.}25$

CL$,$ UCL, LCL