Is there anyone who's good in economics that can provide me the correct answers on my questions, ?

Google started as one of many internet search engines, amazon started as an online book seller, and ebay began as a site where people could sell used personal items in auctions. these firms have grown to be so large and dominant that they are facing antitrust scrutiny from competition regulators in the us and elsewhere. did these online giants grow by fairly beating competition, or did they use unfair advantages? are there any clouds on the horizon for these firms -- could they face diseconomies of scale or diseconomies of scope as they continue to grow? if so, what factors may limit their continued growth?

You should do all of the following before a job interview except

Which of the following best describes the advantage of living in a suburban area? a. suburbs give people access to city jobs along with more living space. b. suburbs give people easy access to cultural attractions and high-paying jobs. c. suburbs have the widest availability of low-cost housing of any living area. d. suburbs have the lowest population density of any living area.