please dont use excel for solve the problem. just solve 15 and 17. thank you

15. (15 pts.) An owner considers opening a new foundry to produce high quality of his products. This foundry can be opened in Denton, Texas; Edwardsville, Illinois; or Fayetteville, Arkansas. He has assembled the following fixed-cost and variable-cost data: a) Graph the total cost lines. b) Over what range of annual volume is each facility going to have a competitive advantage? c) What is the volume at the intersection of the Edwardsville and Fayetteville cost lines? 16. ( 10 pts.) Altman Distributors, Inc., fills catalog orders. Samples of size n=100 orders have been taken each day over the past 6 weeks. The average defect rate was 0,05 . Determine the upper and lower limits for this process for 99.73% confidence level (z=3). 17. (20 pts.) The tasks and details of an assembly line are given in table below. The tasks in the assembly line, which is intended to produce 500 products in 420 minutes, should be shared among the workstations. a) Draw a precedence diagram for tasks. b) Calculate for a day the cycle time and the theoretical minimum number of workstations. c) Assign tasks to the workstations by using the most following task rule. d) Calculate the line efficiency