Which of the following strategies can be implemented in falling interest rate environment to hedge the interest rate risk (select as many as applicable)? Please explain your logic in a concise way.

1. Buy short-term and long-term bonds
2. Sell long term bonds and buy short term
3. Buy long term bonds and sell short term
4. Sell a fixed coupon bond and enter a swap receiver position
5. Buy a fixed coupon bond and enter a swap payer position
6. Buy the corporate bond and sell the matching maturity government bond
7. Buy a CDS
8. Sell a CDS
9. Receive a total return swap
10. Pay a total return swap