Given there are five (05) sample taken. The sample mean (X-bar) are; 8.51, 8.18, 11.07, 10.03, and 10.23 respectively. Also, Range values for these 5 samples are; 3.33, 2.61, 3.39, 4.39, and 6.49. If the lower control limit for X-bar chart is 6.65, what should be the most appropriate the sample size? Select one: O a. 4 O b. None is correct O c.5 d. 2 o e.3 Al Khaleej Inc. needs 400 kgs of a material per month. It costs RO 100 to make and receive an order, and it takes 12 workdays to receive it. The annual holding cost is 15% of purchase price. The price RO 2 per kg. The company is operating 6 workdays per week in a 52-week year. What is the expected time (in weeks) between order? Round-up to the nearest integer Select one: O a. 190 b. 185 O c. None is correct d. 117 e. 207