Given there are five (05) sample taken. The sample means (X-bar) are; 15.36,14.61,16.36,20.28, and 15.77 respectively, Also, the corresponding ranges are; 10.79, 8.37, 2.81,8.17, and 3.31 respectively. If the upper control tirit for R-chart is 14.12, what should be the most appropriate the sample size? Select one: a. 3 b. None is correct C. 4 d.5 e. 2 A manager wishes to build a control chart for a process. A total of five (05) samples are collected with four (04) observations within each sample. The sample means (X-bar) are; 15.36,14.61,16.36,20.28, and 15.77 respectively. Also, the corresponding ranges are; 10.79, 8.37, 2.81,8.17, and 3.31 respectively. The lower and upper control limits of the x- bar chart are respectively Select one: a. 18.55, 13.47 b. 16.55, 11.47 c. 11.59, 21.36 d. None is correct e. 12.40, 19.72