3. 在CAPM架構下，兩家公司即使其總風險(total risk)差異很大，也可能具有相近的必要報酬率。請說明在什麼情況下會出現此結果，並簡要解釋其經濟直覺。(6%)
4. Suppose you borrowed $200,000 at an annual interest rate of 4% for 3 years, to be repaid in equal annual installments. Please complete the following amortization schedule. (Round all amounts to the nearest dollar. Adjust the final payment if necessary so that the ending balance equals zero. You may compute the annual payment first and then complete the table.)

1.