been noted, as followsers work at the data processing department of the Birmingham Bank. Each day for $30$ days, the number of defective records in a sample of $350$ records typed by these operators has

No$.$

Defectives

$17$

$12$

Sample No$.$

$21$

$22$

$23$

$24$

$25$

$26$

$27$

$28$

$573957221315$

$15$

a$)$ Establish $30$ upper and lower control limits

No Defectives

$7$

$6$

$16$

$3$

$3$

$10$

$8$

$12$

$5$

Sample No

$11$

$12$

$13$

$14$

$15$

$16$

$17$

$18$

$19$

$20$

$20912713862$

Sample No

$2$

$345678910$

No Defectives

$6$

$5$

UCL, $1201($enter your response as a number between $0$ and $1$ rounded to three decimal places$)$