A firm's mix of different securities is known as its capital structure. A firm's capital structure has many implications on its overall profitability, riskiness, and sustainability.

The capital structure and the leverage ratios of public companies can be found by utilizing Web sites such as

Gurufocus.com, Yahoo Finance, and MSN Money. Write a minimum $5-$page assessment of the capital structure and leverage ratios of $2$ firms, and include the following in your assessment:

Describe the optimal capital structure theorem and its limitations$.$

Locate the current capital structure and the leverage ratios of $2$ firms.

Examine the capital structure of the $2$ firms.

Explain how the capital structure affects the cost of capital of the $2$ firms and their profits, and provide mathematical examples of different scenarios.

Explain how the leverage of the $2$ firms can affect the riskiness, profitability, and sustainability of the business.

Include an introduction and a conclusion paragraph.