By Luc Olinga Big Tech publishes its third quarter results in a climate of anxiety about the health of the economy. This is a crucial week for Wall Street. Four of the five largest companies in the world, in terms of market value, publish their results for the third quarter. Apple (AAPL) – Get Apple Inc. Report, Microsoft (MSFT) – Get Microsoft Corporation Report, Amazon (AMZN) – Get Amazon.com Inc. Report and Alphabet (GOOGL) – Get Alphabet Inc. Report together represent $6.71 trillion in market value. They are joined by a company with one of the most recognizable names in the world: Facebook…