Studies on a machine that molds plastic water pipe indicate that when it is injecting 26.77 mm diameter pipe, the process standard deviation is 0.58 mm. The pipe has a specification of 26.77 mm plus or minus 1.83 mm. What is the process capability index (Cp)? O a. 2.103 O b. 1.052 O c. 3.155 . O d. 0.5259 Customers arrive at a video rental desk at the rate of 3 per minute(Poisson).Each server can handle 1 customers per minute(Poisson). If there are 4 servers, determine the probability of 3 or fewer customers in the system. O a 0.038 O b. 0.011 O c. 0.491 O d. 0.127 Six samples of five observations each have been taken for a process. The sample means and ranges computed (in minutes) are, (mean, range): (4.04, 0.65), (3.68, 0.75), (3.68, 0.49), (3.98, 0.46), (3.63, 0.46), and (4.11, 0.47). Compute the upper control limit O a 4.116 Ob. 2.396 OC. 4.17 Od 2.782