A Quality Analyst wants to construct a control chart for determining whether three machines, all producing the same product, are under control with regard to a particular quality variable. Accordingly, he sampled four units of output from each machine, with the following results : Machine #1 measurements (12, 24, 24, 20); Machine #2 measurements [ 23, 18, 22, 21); Machine #3 measurements [ 23, 18, 13, 23]. Using the factors for three sigma control limits, what are x-bar chart upper and lower control limits? O a. 47.08and -6.917 O b. 29.26and 10.9 O c. 26.65and 13.51 O d. 22.51and 17.65 Clear my choice In the basic EOQ model, if annual demand is 65, holding cost is $2.52 (per unit per year), and total inventory related cost on the basis of EOQ is $350, the ordering cost per order (rounded to the next whole number) is a. can not be determined b. 748 C. 175 O d. 374