Tanya is the founder of a national engine manufacturing company located in Toronto. She is interested in using lean management tools. She asks you the following questions: a. What does Kanban change in a production systems? (1 points) b. Why do we need to use x-bar and range control charts together? Please give details. (0.5 points) c. What is Jelly Bean scheduling? (0.5 point) d. How will freezing a schedule help stability in leveling schedules? (1 points) e. Why is Kanban not needed in a perfectly running Just-in-Time system? (1 points)