Which of the following is$/$are TRUE?

Question $8$ options:

The volatility of a bond $($i$.$e$.,$ the modified duration$)$ is given by Duration$\backslash$times $(1+$ yield$).$

When the investor's required rate of return $($i$.$e$.,$ the market yield$)$ is greater than the coupon rate of a bond, the bond will sell at a premium.

The call feature of a corporate bond is an advantage to the issuing company if interest rates increase.

All else equal, when interest rates rise, the duration of a coupon bond falls.