YOUR HELP WITH SHORT ANSWERS PLEASE

1-you are analyzing two different projects for your company. One is much riskier than the other. How can you take this difference in risk into account in doing your net present value analysis?

2-Calculate the IRR. A project has an upfront cost of $100,000 and annual cash flow of $20,000 for 12 years.

3-calculate the NPV for the following: the project costs $50,000 upfront and cash flow is $13,000 per year for the next six years. Use a 9% discount rate.

4-what is the specific problem with using the payback method to analyze the following, especially if the company says that they require a 3year payback to adopt projects

upfront cost $100,000

year 1 cash flow $10,000

year 2 cash flow $10,000

year 3 cash flow $10,000

year 4 cash flow $10,000 year 5 cash flow $170,000

5-a company has a capital structure of 45% debt, 5% preferred stock and 50% common stock. If the after tax cost of debt is 5%, cost of preferred is 11% and cost if common is 12%, what is their weighted average cost of capital?