What role should external factors of demand play in successful business models?

In the last 2 chapters of Business Model Generation, the authors describe and analyze the strategy and process for developing successful business models. After carefully reading and understanding these chapters, answer these research questions:
RQ1 What role should external factors of demand play in successful business models? NOTE: First, fully define the role and then analyze or discuss. This must be at least 4 paragraphs.
RQ2 What is “Business Model Design and Innovation”? Provide examples and discussion for each factor listed. This must be at least 3 paragraphs.
RQ3 What are the challenges to “Business Model Design and Innovation”? This must be at least 3 paragraphs.
Deliverables:
This assignment must be in a business professional format with a cover page in current APA format and must contain at least 600–800 words. This assignment must also include current APA citations and references.