PLEASE SHOW ALL WORK.

1.Consider a company subject to a corporate tax rate of 0.6. If the company has a debt ratio of 0.3, and an unleveraged beta of 0.8, what is the company's leveraged beta?

2.What is the internal rate of return of the following set of cash flows?

CO = -300 C01 = 200 C02 = 300 C03 = 50

3.You are currently 30 years old and would like to retire at 65. You currently have no debt or savings. If you start making monthly deposits tomorrow in an index fund of the Wilshire 5000 and assume it will return 8% compounded monthly, how much must you save to retire with $1.5 million?