Hello, I need some help answering these questions and understating the main point and process. I will appreciate a clear and well describe answer, thank you in advance. Regards and, stay safe.

1.In the presence of excess capacity,firms sometimes launch new brands in an effort to increase their profits.Why would a monopolist not launch a new brand?

2.Should a monopoly advertise in an effort to increase its sales and its profits?Why or why not?

3.Why do we hate monopolies so much?Why are some monopolies broken up by the justice department while others are allowed to continue as monopolies?Can you give some examples of monopolies that have been broken up?