Solve Problem $6\mathrm{.}3.$ Part$1$: Develop a complete Pareto Chart of the information given in the Table. Part$2$: Provide a very good advice to the students on how to mitigate each of the four highest occurring reasons for poor grade.

Thirty$-$five samples of size $7$ each were taken from a

fertilizer$-$bag$-$filling machine. The results were overall mean

$57\mathrm{.}75$ Ib; average range $=1\mathrm{.}781$b$.$

a$)$ Determine the upper and lower control limits of the $\stackrel{}{x}$ chart, where $o=3.$

$b$