Answer:
a. Book Value of Common Stock = [9,000,000 shares * $7.00 per share] = $63,000,000
Book Value of Debt = [$80,000,000 + $55,000,000] = $135,000,000
Total Book Value = $63,000,000 + $135,000,000 = $198,000,000
Capital structure weights of Common Stock = [$63,000,000 / $198,000,000] = 0.3182
Capital structure weights of Debt = [$135,000,000 / $198,000,000] = 0.6818
b. Market Value of Common Stock = [9,000,000 shares x $88 per share] = $792,000,000
Market Value of Debt = [($80,000,000 x 98%) + ($55,000,000 x 106%)] = $136,700,000
Total Market Value = $792,000,000 + $136,700,000 = $928,700,000
Capital structure weights of Common Stock = [$792,000,000 / $928,700,000] = 0.8528
Capital structure weights of Debt = [$136,700,000 / $928,700,000] = 0.1472
c. Market values/weigh are always preferred because they reflect the current scenario.