The specifications for a plastic liner for concrete highway projects calls for a thickness of 3.0 mm ± 0.2 mm. The standard deviation of the process is estimated to be 0.02 mm. The process is known to operate at a mean thickness of 2.9 mm. (a) What is the C_pk of the process? Please provide the formula, at least one step of calculation, and the correct answer for full credit. points) (b) Is the process capable based on the C_pk value and why?