AFN, capital budgeting and capital structure

What is the purpose of “Additional Funds Needed (AFN) equation?

 Explain the purpose of Operating and Financial Leverage. 

 Provide a brief explanation on the purpose of Capital Budgeting and why this concept is important to the financial health of a corporation 

 Provide a brief explanation on the purpose of Capital Structure and Cost of Capital, and how these concepts relate to the financial health of a corporation.