I need plagiarism free and APA citation for all 3 questions.

Please, address each of the questions below, in 100-150 words (per question). Include any relevant examples and links to your sources.

1. 1. Why are some advantages and disadvantages of firms's use of long-term debt?

2. 2. Define and explain the concept of flotation costs.

3. 3. What are the benefits to investors of owning preferred stock?

Note: I need plagiarism free and APA citation for all 3 questions.