Google's online advertising market accounts for as much as 80%. The United States Supreme Court thinks that this is close to monopoly, which is detrimental to consumers. It advocates that Google should be split into two companies. (a) how should we determine whether Google has exclusive access to online advertising and (b) is it possible that Google has natural monopoly? Why? (c) what impact will the dismantling of Google into two companies have on the price and trading volume in the online advertising market?

Please answer briefly.