4 page response paper on case study

I’m stuck on a Business question and need an explanation.

write 4 page response paper, addressing the questions below along with the summary of case study

The paper should be in APA format and use additional references.

1. What made BlackBerry so successful initially in the smartphone industry?

2. What role did external factors play in BlackBerry’s demise? Which external factors were most potent, and why?

3. What could BlackBerry’s strategic leaders have done differently to address the external factors you identified in Question 2? Be specific.