The specifications for a plastic liner for a concrete highway project calls for thickness of 3.0 mmplus or minus0.10 mm. The standard deviation of the process is estimated to be 0.02 mm. The upper specification limit for this product? = 3.1 mm ?(round your response to three decimal? places). The lower specification limit for this product? = 2.9 mm ?(round your response to three decimal? places). The process is known to operate at a mean thickness of 3.0 mm. The process capability index ?(Upper C Subscript pk?) ?= . 667 ?(round your response to three decimal? places).