Final answer:
The middle class in Mexico City have a range of jobs, and their income affects their lifestyle by limiting their financial security and making social mobility more challenging.
Step-by-step explanation:
The middle class in Mexico City have a range of jobs, including managers, business people, professionals, and lower-level management or administrative support positions. These jobs provide a decent income that allows them to lead a mainstream lifestyle, but they may struggle to maintain it and often can't build significant savings. Their grip on class status is more precarious, and they are more likely to lose their jobs when companies need to save money. This affects their lifestyle by limiting their financial security and making social mobility more challenging.