Engo realizes that the coating process is essential to ensure the lenses' performance, durability, and visual comfort for the wearer. The following three coatings, including anti-reflective (AR) for effective glare reduction, scratch-resistant (SE) for lenses' durability, and ultraviolet (UV) protection for shielding from harmful ultraviolet radiation, should be applied to its progressive lenses. The general thickness of the multi-coating layer for its lenses is approximately 250 nanometers (nm). Over the past six months, Engo has monitored the thickness of the ProLens multi-coating layer. The historical average thickness of the coating layer is just 248nm, with a range of 8nm. Management aims to eradicate factors contributing to inconsistent performance. Concurrently, Engo requests that the following recent lens coating samples be examined: Calculate the relevant control limits and prepare relevant 3 quality control chart(s). Provide an analysis of the lens thickness output performance based on the recent samples, specifically identifying what, if any, action is recommended. (Use 2 decimals for control limit values)