大家好，我有两道MBA的大题搞不定，可否指点迷津。 谢谢。
第一道，

Rollins Corporation is estimating its WACC.  It’s current and target capital structure is20 percent debt, 20 percent preferred stock, and 60 percent common equity. Itsbonds have a 12 percent coupon rate, paid semiannually, a current maturity of20 years, and sell for $1,040.  The firmcould sell, at par, $100 preferred stock which pays a $12.00 annual preferreddividend.  Rollins' common stock beta is1.2, and the risk-free rate is 10 percent. Rollins is a constant-growth firmwhich just paid a dividend of $2.00.  Itsstock sells for $27.00 per share, and has a growth rate of 3 percent.  The floatation cost is 5% for debt, 10% forpreferred stock, and 25% for common stock. The firm's marginal tax rate is 40 percent.

Question 1 (worth 15 out of 100 possible pointsfor the quiz)

Part a.Calculate the cost of existing debt.

Part b.Calculate the cost of new debt.

Question 2 (worth 15 out of 100 possible pointsfor the quiz)

Part a.Calculate the cost of existingpreferred stock.

Part b.Calculate the cost of new preferredstock.

Question 3 (worth 15 out of 100 possible pointsfor the quiz)

Part a.Calculate the cost of existingcommon stock.

Part b.Calculate the cost of new commonstock.

Question 4 (worth 15 out of 100 possible pointsfor the quiz)

Part a.Calculate the weighted average cost of capital (WACC) for existing capital

Part b.Calculate the weighted average cost of capital (WACC) for new capital

第二道

Question5 (worth 15 out of 100 possible points forthe quiz)

Given thatthe company’s required return (WACC) is 10%, rank the two following projects:

Use onlyone best method to rank the projects

Project	A	B
Project  life	12 years	12 years
Initial  investment	$1,200,000	$1,500,000
Annual  operating cash flows	$180,000	$225,000