Which of the following statements about Fixed Rate Coupon bonds are valid? Check ALL that apply. 1.Group of answer choices All else being equal, the longer the maturity for a fixed rate bond the higher its sensitivity to interest rate changes. 2.A bond trading at a discount will have a yield-to-maturity lower than its coupon rate. 3. If interest rates rise after a bond is issued, its coupon rate will also rise. 4. If interest rates rise after a bond is issued, its current yield will also rise