In textbook 18 Full-Length Cases with Rothaermel - Strategic Management 5th Edition. In section Costco Wholesale in 2020. Explain the case questions below.

Introduction (10 points). Introduce the case in one or two paragraphs describing the market(s) the firm competes in, a summary of the key attributes of their products, and a general description of how well they are performing. State the central question or issue presented in the case. Keep this brief, since your audience knows the details.

External Analysis (20 points). Describe the key external opportunities and threats from the general environment. Also, what forces seem to have the greatest effect on industry attractiveness based on the five forces analysis?

Internal Analysis (20 points). What are the firm's core competencies? Do any of them lead to a sustainable competitive advantage? Use the VRIO framework to justify your claims.