please help me answer three questions.No Plagiarize.just 150

please help me answer three questions.No Plagiarize.just 150 words for each question.What are the various levels of diversification firms can pursue by using different corporate-level strategies?What is a restructuring strategy and what are its common forms? Has anyone worked for a company who has had to downsize? If so, why did they downsize?What are the advantages and disadvantages of single- and dominant-business strategies, compared with those of firms with higher levels of diversification?