Please help me answer these questions. Thank you.

A company has 10 million shares outstanding trading for $7 per share. It also has $300 million in outstanding debt. If its equity cost of capital is 15%, and its debt cost of capital is 9%, and its effective corporate tax rate is 40%, what is its weighted average cost of capital?

A company has the opportunity to do any of the projects for which the net cash flows per year are shown below. The company has a cost of capital of 12%. Which should the company do and why? You must use at least two capital budgeting methods. Show your work.

Year A B C
0 -350 -250 -250
1 100 -50 100
2 100 100 100
3 100 100 100
4 100 100 100
5 100 100 100
6 50 100 100
7 -200 -200 0
A stock has just paid a dividend and has declared an annual dividend of $2.00 to be paid one year from today. The dividend is not expected to grow. The return on equity for similar stocks is 12%. What is P0?

A stock has just paid a dividend and has declared an annual dividend of $2.00 to be paid one year from today. The dividend is expected to grow at a 5% annual rate. The return on equity for similar stocks is 12%. What is P0?