can you explain in details and give the formulas as well? thanks a lot

Question 1: shortly explain all the capital structure theories and compare them with your own words (no copy paste from somewhere. Use your own book as reference.) Then randomly choose three companies enlisted in Borsa stanbul and analyze their balance sheet. Write your comments about their capital structure and analyze with regard to risk and profitability. Question 2: Find the weighted average cost of capital for a company enlisted in Borsa Istanbul. While doing so follow the steps below mentioned. 1. Find the annual return of BIST100. 2. Find the risk free rate given by Turkish Government Short Term bills. 3. Check for the interest rate given by Turkish banks. (Google it) 4. Assume a beta for the company you choose. (a number between 1-2.5 is fine) 5. Find the corporate tax rate in Turkey