“Fixed mindset” versus a “growth mindset?

After reading the first three chapters of Mindset, what does it mean to have a “fixed mindset” versus a “growth mindset?” Describe both mindsets. While Dweck admits that one can have a “fixed mindset” in certain areas and a “growth mindset” in other areas, generally, which mindset do you have?

2. What mindset did Kennedy and his advisors have with the Bay of Pigs invasion? How did this mindset lead to “groupthink?” Conversely, what mindset did Kennedy and his advisors have with the Cuban Missile Crisis? How did this mindset prevent “groupthink?”