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