please need help on problems 2 and 3. use the chart for problem 2 and 3

6. Control charts for X and s are to be established on the Brinell hardness of hardened tool steel in kilograms per square millimeter. Data for subgroup sizes of 8 are shown below. Determine the trial central line and control limits for the X and s charts. Assume that the out-of-control points have assignable causes. Calculate the revised limits and central line. Subgroup Number Subgroup Number x S 26 14 551 522 540 534 545 561 576 579 549 o vau AWN 508 523 569 574 563 561 571 547 584 552 541 545 548 556 553 13 546 riease work Independently 1. Solve problem (6), of page 92 of the Textbook 2. If the intention is to Establish product Specifications for the Tool Hardness, and it was determined that a Process Capability Index Cp of 1.10 will be adequate for this process, Establish the Hardness Specifications - Assume Balanced Values. 3. Determine the Percent of the product that will not meet the Specifications under the previous assumption - Assume Normal Population