Based on Michael Porter$$s words in the video answer the following questions.

What is the difference between a $$Zero Sum Game$$ and a $$Positive Sum Game$?$

Which does MP want to see more of in order for industries to survive?

While this is an industry evaluation, how can a firm in a $$different$$ industry use this information?

Porter believes that a firm$$s strategy should be kept secret. That is$,$ a firm$$s strategy should not be shared with lower$-$level managers or with $$outside$$ people such as suppliers, customers, etc. True? False? Explain.