Why did Tesco's initial international expansion strategy focus on developing nations?

Question: Review the Management Focus on Tesco. Then answer the following questions.
(1) Why did Tesco’s initial international expansion strategy focus on developing nations?
(2) How does Tesco create value in its international operations?
(3) In Asia, Tesco has a history of entering into joint-venture agreements with local partners. What are the benefits of doing this for Tesco? What are the risks? How are those risks mitigated?
(4) In March 2006, Tesco announced it would enter the United States. This represented a departure from its historic strategy of focusing on developing nations. Why do you think Tesco made this decision? How is the U.S market different from others Tesco has entered? What are the risks here?
(5)Licensing proprietary technology to foreign competitors is the best way to give up a firm’s competitive advantage. Discuss.
(6) Discuss how the need for control over foreign operations varies with firms’ strategies and core competencies. What are the implications for the choice of entry mode?

Please include about other things and also about Joint Ventures in the paper. Also make connections with Joint Ventures’s advantages & disadvantages and Tesco’s international business growth strategy.
Joint Venture’s advantages: (1) a firm benefits from a local partner’s knowledge of the host country’s competitive conditions, culture, language, political systems and business. (2) when the development costs and risks of opening a foreign market are high. (3) political considerations. (4) difficult to find a foreign partner who is willing to settle for minority ownership. (5) Joint Venture doesn’t give a firm the tight control over subsidiaries that it might need to realise experience curve or location economies. (6) shared ownership arrangement can lead to conflicts and battles for control between the investing firms if their goals and objectives change or if they take different views as to what the strategy should be.
Please include about Tesco’s exporting, Tesco’s Licensing, Tesco’s franchising, core competencies and entry mode, Tesco’s pressures for cost reductions and entry mode.
Plese put anything you want to add about Tesco’s grocery retailer’s profits and losses ,advantageous and disadvantageous.