Please answer all 4 parts! thanks!

The specification for a plastic liner for concrete highway projects calls for a thickness of 6.0mm0.1mm. The standard deviation of the process is estimated to be 0.02mm. 15. What is the upper specification limit for this product 16. What is the lower specification limit for this product 17. What is the Cp for this process? 18. About what percent of all units of this liner will meet specifications