Construct the appropriate control chart for the sample observations listed below

Observation

$1$

$2$

$3$

$4$

$5$

$6$

$7$

$8$

$9$

$10$

$11$

No$.$ of defects per unit:

$9$

$4$

$3$

$5$

$6$

$3$

$4$

$2$

$3$

$2$

$3$

Question $15$Select one:

a$.$

LCL $=0,$ UCL $=8$

b$.$

LCL$=1,$ UCL$=9$

c$.$

LCL$=2,$ UCL $=6$

d$.$

LCL$=4,$ UCL $8$