The sample size is $....?$

The center line for x$-$chart is $...?$

a$)$ You answer $?$

b$)$ Your answer $?$

c$)$ Your answer UCL $..........$

and LCL $..........$

d$)$ Your answer UCL.............

and LCL$............$

e$)$ Your answer UCL............

and LCL$.............$