business law help!

4.5 Ron creates a precision tool to fix brakes on cars. He calls it RedLight and he has a federal trademark registration. A few states over, Joey has a business where he produces high end artsy interior design tables and he calls them RedLight. Joey's business is about 6 years old. Ron learns about Joey's high-end tables and sends him a cease-anddesist letter claiming that he has a federal registered trademark, so that only he could use the name RedLight for his products. Q: Must Joey stop using the name RedLight for his products? 4.6 Nicole is a serious tech geek. She has a website for her real estate business and has learned some tricks to get people who might have an interest in her houses to read her website. One of the things she does is embed high-end fashion designer names throughout her website. The embedded trademarks are not seen by humans, but the computers searching for data pick up on it. She hopes it will lead to her being included on some beneficial websites. - Q: Is this infringement? 4.7 With large businesses having substantial retained earnings, there has been a shift in strategies to invest in other businesses. At one time, there would have been mergers with businesses in the same industry. But because the large businesses may run into problems with the Sherman Antitrust Act and their large market share, these businesses are acquiring businesses in different industries. Will this mean that the trademarks owned by businesses who are buying up entities in different markets, will be able to claim a monopoly on trademarks also