A precision parts manufacturer produces bolts for use in military aircraft. The specifications for bolt length are 37.50 ± 0.25 cm. The company has established an X bar chart and an R-chart using samples of size five. The center lines for the X bar chart and R-chart are set at 35.25 cm and 1.08 cm, respectively. What is the value of Cp for this process? Select one: a. 0.179 b. 1.333 c. 0.301 d. 0.166