silicon valley overview

Answer the following questions about Silicon Valley as of 2019 statistics

– which countries are their Top investors?
– do insta, FB, Snapchat, Twitter, WhatsApp, have international partners? Who?
– Quick analysis: what went wrong with ToTok, and how can it be avoided in the future
– are there countries that established joint funds with Silicon Valley for app/tech development?

answers should be in bullet points, include referenc