answer all 5 please.

15. Six Sigma focuses on reducing variability in process outputs. A. True B. False 16. Which of the following is least relevant to a lean service system? A. Elimination of unnecessary activities B. Use of a pull system for facilitating goods C. Close relationship with suppliers D. Specialized workers E. Organizing problem-solving groups 17. Revenue management is the use of various techniques to maximize revenue from a fixed, perishable resource. A. True B. False 18. Which of the following is nor a characteristic of a service firm to be a good candidate for using revenue management? A. Fixed, perishable resource B. Ability to segment its market C. Fluctuating demand D. Low marginal sales costs E. None of the above is the answer 19. Which of the following can be used by service firms as a strategy for managing capacity to match capacity and demand? match capacity and dema B. Increasing customer participation C. Cross-training employees D. Using part-time employees E. All of the above