Jim's Outfitters, Inc., makes custom western shirts. The shirts could be flawed in various ways, including flaws in the weave or color of the fabric, loose buttons or decorations, wrong dimensions, and uneven stitches. Jim randomly examined $10$ shirts, with the following results:

$\backslash$table$[[$Shirt$,$Defects$],[1,8],[2,0],[3,7],[4,12],[5,5],[6,10],[7,2],[8,4],[9,6],[10,6]]$

a$.$ Assuming that $10$ observations are adequate for these purposes, determine the threesigma control limits for defects per shirt.

b$.$ Suppose that the next shirt has $13$ flaws. What can you say about the process now?