Subject is Business Principles. Can someone answer these last 4 questions please and thank you!

18-5. What types of investments and expenditures are typi- cally considered in the capital budgeting process? 18-6. What is the difference between a secured loan and an unsecured loan? 18-7. What does it mean when someone refers to a company's capital structure? 18-8. How can factoring help a company manage its cash flow